{"title":"Sleep \u0026 Wellness","description":"Blue light, noise, light leaks. Glasses, masks, and ear plugs that actually work.","products":[{"product_id":"silicone-ear-plugs","title":"Silicone Ear Plugs | Reusable | Plastic Free","description":"\u003cp\u003eMedical-grade silicone, no foam, no PVC, no phthalates. Reusable for months.\u003c\/p\u003e\n\u003cp\u003eNocturnal noise raises cortisol even when you don’t wake up. ~27dB reduction, reusable, medical-grade silicone — no foam, no latex, no wax.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003e100% silicone\u003c\/dd\u003e\n\u003cdt\u003eNRR\u003c\/dt\u003e\n\u003cdd\u003e~27dB\u003c\/dd\u003e\n\u003cdt\u003eType\u003c\/dt\u003e\n\u003cdd\u003ePush-in\u003c\/dd\u003e\n\u003cdt\u003eReusable\u003c\/dt\u003e\n\u003cdd\u003eYes — months of use\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eMaterials\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eMedical-Grade Silicone\u003c\/strong\u003e (100%) — \u003cem\u003eBody\u003c\/em\u003e\u003cbr\u003eHypoallergenic, non-porous, flexible. No latex, no PVC, no phthalates. The same silicone used in medical devices.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eWhat we left out\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoam (polyurethane)\u003c\/strong\u003e \u003cem\u003e(Material)\u003c\/em\u003e\u003cbr\u003eFoam ear plugs are single-use and harbour bacteria within hours. Even foam plugs marketed as ‘reusable’ degrade after a few washes because the open-cell structure traps moisture and can’t be sterilised. They expand inside the ear canal, applying outward pressure. Silicone is washable, reusable for months, and sits at the canal opening without internal expansion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLatex\u003c\/strong\u003e \u003cem\u003e(Material)\u003c\/em\u003e\u003cbr\u003eLatex is one of the most common contact allergens. Repeated exposure increases sensitisation risk. Medical-grade silicone is hypoallergenic and non-sensitising — the same material used in implants and medical devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePVC (polyvinyl chloride)\u003c\/strong\u003e \u003cem\u003e(Material)\u003c\/em\u003e\u003cbr\u003eCheap ear plugs use PVC softened with phthalate plasticizers. Phthalates are endocrine disruptors that leach from PVC with body heat and moisture — exactly the conditions inside an ear canal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWax\u003c\/strong\u003e \u003cem\u003e(Material)\u003c\/em\u003e\u003cbr\u003eWax ear plugs melt at body temperature, leave residue in the ear canal, and are single-use. Silicone holds its shape at body temperature and cleans with soap and water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhthalate plasticizers (DEHP \/ DINP)\u003c\/strong\u003e \u003cem\u003e(Additives)\u003c\/em\u003e\u003cbr\u003eUsed to soften PVC and some foam formulations. Phthalates interfere with hormone signalling. Not present in medical-grade silicone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAntimicrobial chemical treatments\u003c\/strong\u003e \u003cem\u003e(Additives)\u003c\/em\u003e\u003cbr\u003eSome ear plugs add triclosan or silver nanoparticles to combat the bacterial growth their own foam material encourages. Silicone is non-porous — bacteria can’t colonise the surface, so no antimicrobial additives are needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy we built it this way\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e100% medical-grade silicone — hypoallergenic, non-porous, no latex, no PVC, no phthalates\u003c\/li\u003e\n\u003cli\u003e~27dB noise reduction — reduces background noise without eliminating alarms or doorbells\u003c\/li\u003e\n\u003cli\u003eReusable for months — wash with soap and water. Foam plugs are single-use and harbour bacteria\u003c\/li\u003e\n\u003cli\u003eComfortable for side sleepers — soft silicone deforms under pillow pressure without poking\u003c\/li\u003e\n\u003cli\u003eNocturnal noise increases cortisol even without waking you (Hume et al., 2012) — plugs prevent this\u003c\/li\u003e\n\u003cli\u003eNight-time noise above 30dB disrupts sleep architecture (Basner et al., 2014) — these bring most environments below threshold\u003c\/li\u003e\n\u003cli\u003eNo foam — foam ear plugs expand inside the canal, trap moisture, and can’t be sterilised\u003c\/li\u003e\n\u003cli\u003eNo wax — wax plugs melt at body temperature and leave residue. Silicone holds shape\u003c\/li\u003e\n\u003cli\u003ePush-in design — seals the ear canal opening, doesn’t need to be inserted deep\u003c\/li\u003e\n\u003cli\u003eComplete the sleep setup — pair with Silk Sleep Mask for light and Blue Light Glasses for screens\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to use\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePick the right size\u003c\/strong\u003e\u003cbr\u003eTry both sizes if included. The plug should sit snugly at the opening of your ear canal without being forced in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert gently\u003c\/strong\u003e\u003cbr\u003ePush the plug into your ear canal. Don’t force it deep — it should sit at the opening and create a seal by contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the seal\u003c\/strong\u003e\u003cbr\u003eYou should feel the noise drop immediately. If sound is still getting through, adjust the position or try the other size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean after each use\u003c\/strong\u003e\u003cbr\u003eWarm water, mild soap. Air dry. They’ll last months with daily use.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWhat are the best ear plugs for sleeping?\u003c\/h3\u003e\u003cp\u003eMaterial matters most. Foam plugs are single-use, harbour bacteria, and expand inside the ear canal. Wax melts at body temperature. Silicone is reusable, washable, hypoallergenic, and sits flush at the canal opening. ~27dB reduction brings most bedroom environments below the 30dB threshold where sleep disruption begins (Basner et al., 2014).\u003c\/p\u003e\u003ch3\u003eDo ear plugs actually improve sleep quality?\u003c\/h3\u003e\u003cp\u003eYes. Nocturnal noise increases cortisol and disrupts sleep stages even when you don’t consciously wake (Hume et al., 2012). Subjective sleep quality deteriorates above 32dB (Öhrström \u0026amp; Rylander, 1990). Ear plugs bringing ambient noise below threshold let your body stay in deep and REM sleep instead of cycling to lighter stages.\u003c\/p\u003e\u003ch3\u003eWill I hear my alarm?\u003c\/h3\u003e\u003cp\u003eYes. ~27dB reduction means sounds are quieter, not gone. Alarms, fire alarms, and doorbells remain audible. This is a safety feature, not a limitation.\u003c\/p\u003e\u003ch3\u003eAre they comfortable for side sleepers?\u003c\/h3\u003e\u003cp\u003eSilicone is soft and sits flush with the ear — nothing sticks out. Much more comfortable than rigid foam plugs that dig in under pillow pressure.\u003c\/p\u003e\u003ch3\u003eSilicone vs foam vs wax ear plugs?\u003c\/h3\u003e\u003cp\u003eFoam: single-use, expands inside the canal, can’t be sterilised, harbours bacteria within hours. Wax: melts at body temperature, leaves residue, single-use. Silicone: reusable for months, washable, non-porous, hypoallergenic. Medical-grade silicone is the same material used in medical implants.\u003c\/p\u003e\u003ch3\u003eHow do I clean them?\u003c\/h3\u003e\u003cp\u003eWarm water and mild soap after each use. Air dry. They’re reusable for months with daily use.\u003c\/p\u003e\u003ch3\u003eWhat’s the noise reduction rating?\u003c\/h3\u003e\u003cp\u003eApproximately 27dB NRR. That’s enough to bring most urban bedrooms below the 30dB threshold where sleep disruption begins, while keeping safety-critical sounds audible.\u003c\/p\u003e\u003ch3\u003eCan I use them for swimming?\u003c\/h3\u003e\u003cp\u003eYes. Silicone creates a watertight seal at the ear canal opening. Also works for focus work, travel, concerts, and any environment where you want noise reduction without full isolation.\u003c\/p\u003e\n\u003ch2\u003eResearch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHume et al.\u003c\/strong\u003e (2012). \u003cem\u003eNoise \u0026amp; Health\u003c\/em\u003e\u003cbr\u003eNocturnal noise exposure increases arousals and shifts sleep to lighter stages, even when subjects don’t consciously wake\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBasner et al.\u003c\/strong\u003e (2014). \u003cem\u003eThe Lancet\u003c\/em\u003e\u003cbr\u003eEnvironmental noise is a significant public health concern — cardiovascular risk increases with chronic nighttime noise above 40dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eÖhrström E, Rylander R\u003c\/strong\u003e (1990). \u003cem\u003eArchives of Environmental Health\u003c\/em\u003e\u003cbr\u003eSubjective sleep quality deteriorated measurably at night-time noise exposures above 32 dB(A). Participants reported increased fatigue, reduced morning alertness, and more frequent awakenings. Even subjects who reported no conscious waking showed elevated cortisol the next morning — the autonomic system reacts to noise even when the conscious mind does not.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEso World\u003c\/strong\u003e publishes every material in every product. The full materials list, exclusion list, and citations live on the product page.\u003c\/p\u003e","brand":"Eso World","offers":[{"title":"Black","offer_id":54111652806996,"sku":"FP-EARPLUG-BLACK","price":5.99,"currency_code":"GBP","in_stock":true},{"title":"White","offer_id":54111652839764,"sku":"FP-EARPLUG-WHITE","price":5.99,"currency_code":"GBP","in_stock":true},{"title":"Green","offer_id":54111652872532,"sku":"FP-EARPLUG-GREEN","price":5.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/5655\/7908\/files\/104A6287.jpg?v=1775336999"},{"product_id":"silk-sleep-mask","title":"Silk Sleep Mask | 100% Mulberry Silk","description":"\u003cp\u003eMulberry silk through and through — shell and fill, both sides. Plant-based dyes, Oeko-Tex Standard 100. Every material on the page.\u003c\/p\u003e\n\u003cp\u003eMelatonin suppression begins at 1.3 lux — less than streetlight bleed-through, and closed eyelids don’t block it (Zeitzer et al., 2000). Most ‘silk’ sleep masks are polyester labelled ‘satin’, treated with formaldehyde-resin wrinkle finishes that release with body heat over 8 hours of skin contact. This is 22 momme mulberry silk on both sides, plant-based dyes only, with the silk independently tested to Oeko-Tex Standard 100.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003e100% mulberry silk — shell, lining and fill\u003c\/dd\u003e\n\u003cdt\u003eShape\u003c\/dt\u003e\n\u003cdd\u003eContoured, total light block\u003c\/dd\u003e\n\u003cdt\u003eStrap\u003c\/dt\u003e\n\u003cdd\u003eElastic\u003c\/dd\u003e\n\u003cdt\u003eDyes\u003c\/dt\u003e\n\u003cdd\u003ePlant-based, GOTS-compatible\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eMaterials\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulberry Silk\u003c\/strong\u003e (~90%) — \u003cem\u003eShell \u0026amp; lining\u003c\/em\u003e\u003cbr\u003eBoth sides are 100% mulberry silk at 22 momme weight — the highest density commonly available. Mulberry silk is a natural protein fibre produced by Bombyx mori silkworms fed exclusively on mulberry leaves, resulting in the longest, smoothest, most uniform silk strands. It has the lowest friction coefficient of any common textile (Kaplan \u0026amp; Okur, 2008), meaning less creasing and irritation against facial skin over 8 hours. Naturally hypoallergenic — silk protein resists dust mites, mould, and bacterial colonisation. Temperature-regulating — breathes and wicks moisture, keeping the skin surface cool in summer and warm in winter, unlike polyester which traps heat and sweat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilk Fill\u003c\/strong\u003e (~8%) — \u003cem\u003ePadding\u003c\/em\u003e\u003cbr\u003e100% mulberry silk padding for the contoured shape — silk through and through, not the cotton or polyester fill most masks hide inside a silk shell. No memory foam, no polyurethane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElastic Strap\u003c\/strong\u003e (~2%) — \u003cem\u003eStrap\u003c\/em\u003e\u003cbr\u003eElastic for a secure fit. Flat design that won’t tangle hair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat we left out\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolyester labelled ‘satin’\u003c\/strong\u003e \u003cem\u003e(Fabric)\u003c\/em\u003e\u003cbr\u003e‘Satin’ is a weave, not a material — the vast majority of ‘silk’ sleep masks sold online are polyester satin. Even masks marketed as ‘100% silk’ often use silk on the outer shell only, with a cotton or polyester inner lining or a cotton\/polyester filling between the layers. This mask is 100% mulberry silk on both sides, 22 momme weight, AND 100% mulberry silk fill inside — no cotton, no polyester, no synthetic filling or lining anywhere. Silk through and through.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynthetic and azo dyes\u003c\/strong\u003e \u003cem\u003e(Dyes)\u003c\/em\u003e\u003cbr\u003ePlant-based dyes only. Azo dyes can release carcinogenic aromatic amines under skin contact and perspiration — restricted in the EU but common in imports.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory foam \/ polyurethane padding\u003c\/strong\u003e \u003cem\u003e(Padding)\u003c\/em\u003e\u003cbr\u003eNo foam. The contoured shape blocks light without putting polyurethane (which off-gasses TDI\/MDI for months) against your face for 8 hours a night.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormaldehyde wrinkle-free treatments\u003c\/strong\u003e \u003cem\u003e(Processing)\u003c\/em\u003e\u003cbr\u003eLow-grade imported silks often use formaldehyde resins for wrinkle resistance — releases formaldehyde with body heat and perspiration. GOTS-compatible processing only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlastic nose bridge \/ elastic\u003c\/strong\u003e \u003cem\u003e(Hardware)\u003c\/em\u003e\u003cbr\u003eNo plastic nose-bridge insert and no plasticized elastic. Natural rubber elastic in a cotton sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVelcro closures\u003c\/strong\u003e \u003cem\u003e(Fastening)\u003c\/em\u003e\u003cbr\u003eVelcro catches and damages silk. Elastic strap — simpler, quieter, won’t tangle hair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGel eye inserts\u003c\/strong\u003e \u003cem\u003e(Padding)\u003c\/em\u003e\u003cbr\u003eSome masks add gel inserts for ‘cooling’. These are PVC or silicone filled with glycerine — adding weight, synthetic materials against your skin, and a component that eventually leaks. The contoured silk shape blocks light without any of that.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy we built it this way\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e100% mulberry silk on both sides — not polyester labelled ‘satin’ (satin is a weave, not a material)\u003c\/li\u003e\n\u003cli\u003eSilk fill, not cotton or polyester — the padding inside is 100% mulberry silk too. Most ‘silk’ masks (even ones sold as ‘100% silk’) use a silk shell over a cotton or polyester fill. This one is silk through and through.\u003c\/li\u003e\n\u003cli\u003e22 momme weight — the highest density commonly available. Thicker silk = more durable, softer, better light block\u003c\/li\u003e\n\u003cli\u003eTotal light block — contoured shape with no gaps at nose or temples. No light leaks around edges\u003c\/li\u003e\n\u003cli\u003eHypoallergenic — silk protein naturally resists dust mites, mould, and bacterial growth\u003c\/li\u003e\n\u003cli\u003eTemperature-regulating — silk breathes and wicks moisture, stays cool in summer, warm in winter\u003c\/li\u003e\n\u003cli\u003eLess friction on skin than cotton or polyester — silk’s smooth protein surface reduces creasing and irritation\u003c\/li\u003e\n\u003cli\u003eElastic strap — fits all head sizes without pressure points\u003c\/li\u003e\n\u003cli\u003ePlant-based dyes only — no synthetic colourants, no azo dyes, no heavy metal pigments\u003c\/li\u003e\n\u003cli\u003eNo memory foam padding — contoured shape blocks light without putting polyurethane against your skin\u003c\/li\u003e\n\u003cli\u003eHand wash only — silk is a natural protein fibre that degrades in machine wash. This is by design, not a limitation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to use\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition the mask\u003c\/strong\u003e\u003cbr\u003ePull the strap until it sits comfortably without pressing on your temples. Snug, not tight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition the contoured cups over your eyes\u003c\/strong\u003e\u003cbr\u003eThe raised sections should sit in your eye sockets. This is what blocks light at the nose and temples.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSleep\u003c\/strong\u003e\u003cbr\u003eThe mask stays put. If you’re a side sleeper, the flat profile won’t dig in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand wash weekly\u003c\/strong\u003e\u003cbr\u003eCool water, mild detergent, press dry between towels. Don’t wring silk — it weakens the fibres.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWhat is the best sleep mask?\u003c\/h3\u003e\u003cp\u003eThe material against your face matters most. Most masks sold as ‘silk’ or ‘satin’ are polyester — a petroleum-derived fabric that traps heat, doesn’t breathe, and sheds microplastics against your skin for 8 hours a night. This mask is 100% mulberry silk on both sides at 22 momme weight — the highest density commonly available. It blocks light completely, regulates temperature naturally, and the surface against your face is protein, not petroleum.\u003c\/p\u003e\u003ch3\u003eDo sleep masks actually help you sleep?\u003c\/h3\u003e\u003cp\u003eYes. Even dim light during sleep suppresses melatonin and disrupts slow-wave sleep stages (Cho et al., 2016). Melatonin suppression begins at just 1.3 lux — far below a streetlight through curtains (Zeitzer et al., 2000). Total darkness is required for unrestricted melatonin synthesis. A properly fitting mask that blocks all light achieves this without blackout curtains.\u003c\/p\u003e\u003ch3\u003eIs there a difference between silk and satin sleep masks?\u003c\/h3\u003e\u003cp\u003eYes — and it’s the single biggest thing to check before buying. Satin is a weave, not a material. Most masks sold as ‘silk satin’ or just ‘satin’ are polyester in a satin weave. The feel is similar at first touch, but polyester doesn’t breathe, doesn’t regulate temperature, sheds microplastics, and traps sweat against your skin for 8 hours a night. Real mulberry silk is a natural protein fibre — hypoallergenic, temperature-regulating. This mask is 100% mulberry silk on both sides.\u003c\/p\u003e\u003ch3\u003eWhat does momme weight mean?\u003c\/h3\u003e\u003cp\u003eMomme is the unit used to measure silk density. Higher momme = thicker, more durable, softer silk. Most silk products are 12–16 momme. This mask is 22 momme — the highest commonly available. The difference is noticeable in durability, light blocking, and how the silk feels against skin.\u003c\/p\u003e\u003ch3\u003eIs it actually silk on both sides?\u003c\/h3\u003e\u003cp\u003eYes — and so is the fill. Both the outer shell and the inner lining that touches your face are 100% mulberry silk, and the padding between them is 100% mulberry silk too: silk through and through. Many competitors use polyester on one side and silk on the other, or polyester on both sides marketed as ‘satin’ — and even most masks sold as ‘100% silk’ mean the shell only, with a cheaper cotton or polyester fill hidden inside. This one has no cotton and nothing synthetic anywhere.\u003c\/p\u003e\u003ch3\u003eWill it slip off during sleep?\u003c\/h3\u003e\u003cp\u003eThe elastic strap holds it in place. The contoured shape sits in your eye sockets rather than pressing flat, so it stays put even for side sleepers.\u003c\/p\u003e\u003ch3\u003eHow do I wash it?\u003c\/h3\u003e\u003cp\u003eHand wash in cool water with mild detergent. Don’t wring — press gently between towels. Air dry flat. Machine washing degrades silk protein fibres.\u003c\/p\u003e\u003ch3\u003eCan I wear it with eyelash extensions?\u003c\/h3\u003e\u003cp\u003eYes. The contoured shape creates a dome over your eyes rather than pressing flat against lashes. No contact with the eye area.\u003c\/p\u003e\u003ch3\u003eHow do I get the best light block from it?\u003c\/h3\u003e\u003cp\u003ePosition the mask so the contoured cups sit inside your eye sockets — not pressed flat across the bridge of your nose. The dome shape is what blocks light at the temples and nose; a flat-sitting mask leaves gaps in those exact places. Side sleepers: the low profile means it won’t dig in against the pillow. If light still leaks at the bridge, the mask is sitting too high — shift it down so the lower edge sits flush against your cheekbones.\u003c\/p\u003e\u003ch3\u003eWhat about the synthetic ‘silk’ mask I already have?\u003c\/h3\u003e\u003cp\u003ePolyester sheds microplastic fibres against your skin under friction (Napper \u0026amp; Thompson, 2016) and traps body heat and sweat — your face perspires for 8 hours, and synthetic fabric doesn’t wick. The dye and any wrinkle-resin finish keep migrating as long as you keep wearing it. There’s no way to ‘rinse out’ a finishing chemistry that’s bonded to the fibre. The fastest fix is to replace the contact-side fabric. The slower fix is to keep using it and accept the trade-off.\u003c\/p\u003e\n\u003ch2\u003eResearch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCho CH, Lee HJ, Yoon HK, Kang SG, Bok KN, Jung KY, Kim L, Lee EI\u003c\/strong\u003e (2016). \u003cem\u003eChronobiology International\u003c\/em\u003e\u003cbr\u003eExposure to dim light during sleep (~40 lux, equivalent to a bedroom with streetlight bleed-through) impairs glucose metabolism and insulin sensitivity the next day. Closed eyelids do not fully block light exposure. Total darkness during sleep is required for optimal metabolic recovery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZeitzer JM, Dijk DJ, Kronauer RE, Brown EN, Czeisler CA\u003c\/strong\u003e (2000). \u003cem\u003eJournal of Physiology\u003c\/em\u003e\u003cbr\u003eMelatonin suppression in humans begins at just 1.3 lux — far below normal indoor lighting. Full darkness is required for unrestricted melatonin synthesis, which drives restorative sleep architecture. Any ambient light during sleep partially suppresses melatonin, reducing sleep quality measurably.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHatori M, Panda S\u003c\/strong\u003e (2010). \u003cem\u003eTrends in Molecular Medicine\u003c\/em\u003e\u003cbr\u003eArtificial light at night disrupts the master circadian clock in the suprachiasmatic nucleus, with downstream effects on metabolism, hormone regulation, and sleep architecture. Chronic exposure to light during biological night is associated with increased risk of metabolic and mood disorders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eObradovich N, Migliorini R, Mednick SC, Fowler JH\u003c\/strong\u003e (2017). \u003cem\u003eScience Advances\u003c\/em\u003e\u003cbr\u003eSleep quality is directly linked to ambient environmental conditions including light and temperature. Temperature dysregulation during sleep reduces time spent in restorative stages. Silk’s thermoregulatory properties — wicking moisture and maintaining skin surface temperature — address the thermal dimension of sleep quality that synthetic fabrics disrupt.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKaplan S, Okur A\u003c\/strong\u003e (2008). \u003cem\u003eFibres and Textiles in Eastern Europe\u003c\/em\u003e\u003cbr\u003eMulberry silk has a lower coefficient of friction than any common textile fibre including cotton, polyester, and nylon. The smooth protein surface reduces mechanical irritation on skin contact. For a fabric pressed against facial skin for 8 hours nightly, friction coefficient directly determines whether the material causes creasing, irritation, and moisture trapping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEso World\u003c\/strong\u003e publishes every material in every product. The full materials list, exclusion list, and citations live on the product page.\u003c\/p\u003e","brand":"Eso World","offers":[{"title":"Pale Blue","offer_id":54111652938068,"sku":"FP-SLP_MSK-PALE-BLUE","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"White","offer_id":54111652970836,"sku":"FP-SLP_MSK_WHT","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"Brown","offer_id":55789291012436,"sku":"FP-SLP_MSK-BROWN","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"Sage","offer_id":55789291045204,"sku":"FP_SLP_MSK_SAGE","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"Pink","offer_id":55789291077972,"sku":"FP-SLP_MSK-PINK","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"Cream","offer_id":55789291110740,"sku":"FP-SLP_MSK-CREAM","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"Dark Teal","offer_id":55789291143508,"sku":"FP-SLP_MSK-DARK-TEAL","price":24.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/5655\/7908\/files\/group-staircase-grass-7523_386d372c-1368-4abb-ada4-4fd19195dce3.png?v=1778654735"},{"product_id":"blue-light-blocking-glasses","title":"Blue Light Blocking Glasses | Red Lens","description":"\u003cp\u003eRed lens, TR90 nylon frame, 99.9% blocking at 400–530nm. Every material on the page.\u003c\/p\u003e\n\u003cp\u003eMelatonin suppression begins at 1.3 lux of indoor light (Zeitzer et al., 2000), and screens emit at 460–480nm — the exact wavelength your retinal melanopsin photoreceptors are most sensitive to. LED screens suppress melatonin by 55% in controlled crossover studies (Cajochen et al., 2011). Clear ‘blue light’ glasses block 5–15% of that wavelength; yellow blocks 20–40%; the RCTs that actually showed sleep improvement used lenses blocking the full 400–530nm range at 99%+ (Burkhart \u0026amp; Phelps, 2009). Anything less is theatre.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003eLens\u003c\/dt\u003e\n\u003cdd\u003eRed, 400–530nm blocking\u003c\/dd\u003e\n\u003cdt\u003eFrame\u003c\/dt\u003e\n\u003cdd\u003eTR90 (BPA-free)\u003c\/dd\u003e\n\u003cdt\u003eBlocking\u003c\/dt\u003e\n\u003cdd\u003e99.9% blue light\u003c\/dd\u003e\n\u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e~25g\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eMaterials\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTR90 Nylon\u003c\/strong\u003e (~70%) — \u003cem\u003eFrame\u003c\/em\u003e\u003cbr\u003eLightweight, flexible thermoplastic. BPA-free. Used in high-end eyewear for durability and comfort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed Polycarbonate Lens\u003c\/strong\u003e (~25%) — \u003cem\u003eLenses\u003c\/em\u003e\u003cbr\u003eFilters 99.9% of blue light in the 400–530nm range. Optical-grade clarity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless Steel Hinges\u003c\/strong\u003e (~5%) — \u003cem\u003eHinges\u003c\/em\u003e\u003cbr\u003eDurable metal hinges. No plastic joints to snap.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat we left out\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBPA \/ BPS \/ BPF\u003c\/strong\u003e \u003cem\u003e(Plastics)\u003c\/em\u003e\u003cbr\u003eTR90 nylon frame is entirely bisphenol-free. BPA is an endocrine disruptor that mimics oestrogen (Rochester \u0026amp; Bolden, 2015). BPS and BPF — the ‘BPA-free’ substitutes — bind to the same receptors. Our frame material doesn’t contain any of them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolycarbonate frame\u003c\/strong\u003e \u003cem\u003e(Frame material)\u003c\/em\u003e\u003cbr\u003ePolycarbonate is synthesised from bisphenol A. Many cheap blue-light glasses use PC frames because it’s cheaper than TR90. We use TR90 nylon — a medical-grade thermoplastic with no BPA content.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear or yellow lenses\u003c\/strong\u003e \u003cem\u003e(Lens inefficacy)\u003c\/em\u003e\u003cbr\u003eClear ‘blue light’ lenses block 5–15% of the 460nm peak. Yellow lenses block 20–40%. Even brands that claim ‘blocks blue light’ on the box rarely disclose what percentage or which wavelengths — because the number is usually under 40%, which is insufficient to prevent melatonin suppression (Burkhart \u0026amp; Phelps, 2009). The research that showed sleep improvement used lenses blocking 400–530nm at 99.9% — which is what ours do.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-based lens tinting\u003c\/strong\u003e \u003cem\u003e(Lens additives)\u003c\/em\u003e\u003cbr\u003eSome tinted lenses use lead-based pigments or cadmium compounds for colour. Our lenses are optical-grade red polycarbonate — the colour is intrinsic to the polymer, not an applied coating or dye.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhthalate plasticisers\u003c\/strong\u003e \u003cem\u003e(Frame softeners)\u003c\/em\u003e\u003cbr\u003eFlexible plastic frames sometimes contain phthalate plasticisers (DEHP, DINP). Phthalates are endocrine disruptors. TR90 achieves its flexibility from the polymer structure itself, not from added plasticisers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNickel nose pads\u003c\/strong\u003e \u003cem\u003e(Skin contact)\u003c\/em\u003e\u003cbr\u003eNickel is the most common contact allergen. Many metal-framed glasses use nickel alloy nose pads. Our TR90 frame has integrated polymer nose pads — no metal contacts against skin.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy we built it this way\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRed lens blocks 99.9% of blue light at 460–480nm — clear lenses block 5–15%, yellow 20–40%\u003c\/li\u003e\n\u003cli\u003eMelatonin production begins within 30–90 minutes — measured from the moment you put them on (Cajochen et al., 2011)\u003c\/li\u003e\n\u003cli\u003eClinically demonstrated sleep improvement in RCTs — not just marketing claims (Burkhart \u0026amp; Phelps, 2009)\u003c\/li\u003e\n\u003cli\u003eTR90 nylon frame — medical-grade, BPA-free, phthalate-free, lighter than acetate at ~25g\u003c\/li\u003e\n\u003cli\u003eDesigned for evening use only — 1–2 hours before bed, not all-day wear\u003c\/li\u003e\n\u003cli\u003eWorks regardless of screen — filters at the eye, covers TV + phone + laptop + LED room lighting simultaneously\u003c\/li\u003e\n\u003cli\u003eNo nickel nose pads — integrated polymer contacts, no metal allergens against skin\u003c\/li\u003e\n\u003cli\u003eNo lead-based lens tinting — red polycarbonate, colour is intrinsic to the polymer, not an applied dye\u003c\/li\u003e\n\u003cli\u003eStainless steel hinges — no plastic joints to snap\u003c\/li\u003e\n\u003cli\u003eProtects against cumulative retinal blue-light damage (Tosini et al., 2016)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to use\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePut them on 1–2 hours before bed\u003c\/strong\u003e\u003cbr\u003eThat’s when it matters. Your body needs 1–2 hours without blue light to start producing melatonin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWear them for all screen time\u003c\/strong\u003e\u003cbr\u003ePhone, TV, laptop, overhead LED lights — all emit blue light. Keep the glasses on for all of it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEverything will look red\u003c\/strong\u003e\u003cbr\u003eThat’s the point. You adjust in about 5 minutes. It feels strange the first night, then you stop noticing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTake them off and go to sleep\u003c\/strong\u003e\u003cbr\u003eWhen you’re ready for bed, remove the glasses and keep the lights off. Your melatonin is already flowing.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eDo blue light blocking glasses actually work?\u003c\/h3\u003e\u003cp\u003eYes — but only if they block enough. Burkhart \u0026amp; Phelps (2009) demonstrated that amber\/red lenses improve sleep quality in an RCT. Chang et al. (2015) showed screens suppress melatonin dose-dependently. The key: clear lenses block 5–15% of the 460nm peak. Yellow blocks 20–40%. Red blocks 99.9%. The research showing sleep improvement used lenses that blocked the full 400–530nm range — which is what ours do.\u003c\/p\u003e\u003ch3\u003eWhy red and not yellow or clear?\u003c\/h3\u003e\u003cp\u003eThe melanopsin photoreceptors in your retina (ipRGCs) that control melatonin suppression are most sensitive at 460–480nm. Clear coatings and yellow tints leave most of this wavelength untouched. Red lenses remove it entirely. The 2009 Burkhart \u0026amp; Phelps study used amber lenses (similar spectrum to red). Shechter et al. (2018) replicated with amber lenses and found clinically significant sleep and mood improvements.\u003c\/p\u003e\u003ch3\u003eHow long before bed should I wear them?\u003c\/h3\u003e\u003cp\u003e1–2 hours before your intended sleep time. Melatonin onset takes approximately 30–90 minutes after blue light exposure stops (Cajochen et al., 2011). Wearing them during your evening wind-down routine — TV, phone, reading on a tablet — lets melatonin build naturally.\u003c\/p\u003e\u003ch3\u003eCan I wear them all day?\u003c\/h3\u003e\u003cp\u003eThey’re designed for evening use only. Daytime blue light exposure is important for circadian rhythm regulation, alertness, and mood. Blocking it during the day would be counterproductive.\u003c\/p\u003e\u003ch3\u003eWill they help with insomnia?\u003c\/h3\u003e\u003cp\u003eIf your insomnia is related to screen use and circadian disruption, yes. Shechter et al. (2018) showed significant sleep improvement in insomnia patients wearing blue-blocking glasses for just 2 hours before bed over 7 nights. If your insomnia has other causes (anxiety, pain, medical conditions), glasses alone won’t solve it.\u003c\/p\u003e\u003ch3\u003eWhat about night mode \/ screen filters?\u003c\/h3\u003e\u003cp\u003eSoftware night modes (Apple Night Shift, Android Night Light, f.lux) reduce blue light emission by 20–60%. Better than nothing, but they don’t eliminate it. Glasses filtering at the eye block 99.9% regardless of which screen you’re looking at — TV, phone, laptop, smart home displays, LED room lighting.\u003c\/p\u003e\u003ch3\u003eAre they safe for my eyes?\u003c\/h3\u003e\u003cp\u003eYes. Red lenses filter blue wavelengths; they don’t emit anything. Your eyes receive the same visible light minus the 400–530nm band. There is no UV component. Tosini et al. (2016) actually suggested blue light filtering as protective against cumulative retinal damage.\u003c\/p\u003e\u003ch3\u003eDo they fit over prescription glasses?\u003c\/h3\u003e\u003cp\u003eThese are standard frames, not fit-overs. If you wear prescription glasses, you’d need clip-on red filters or prescription blue-light-blocking lenses from your optician.\u003c\/p\u003e\n\u003ch2\u003eResearch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBurkhart K, Phelps JR\u003c\/strong\u003e (2009). \u003cem\u003eChronobiology International\u003c\/em\u003e\u003cbr\u003eAmber-tinted lenses that block blue light significantly improved sleep quality and mood in participants with insomnia. The study demonstrated that filtering wavelengths below 530nm allowed earlier melatonin onset and improved subjective sleep scores compared to clear control lenses. This was one of the first RCTs linking blue-light filtering eyewear to measurable sleep improvement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChang AM, Aeschbach D, Duffy JF, Czeisler CA\u003c\/strong\u003e (2015). \u003cem\u003eProceedings of the National Academy of Sciences\u003c\/em\u003e\u003cbr\u003eUsing light-emitting eReaders before bed suppressed melatonin, delayed circadian rhythm, reduced next-morning alertness, and increased sleep onset latency compared to reading printed books. The effect was dose-dependent: more screen time = more suppression. Participants took an average of 10 minutes longer to fall asleep on eReader nights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCajochen C, Frey S, Anders D, Späti J, Bues M, Pross A, Mager R, Wirz-Justice A, Stefani O\u003c\/strong\u003e (2011). \u003cem\u003eJournal of Applied Physiology\u003c\/em\u003e\u003cbr\u003eLED-backlit screens suppressed melatonin by 55% compared to non-LED screens in a controlled crossover study. The suppression was specific to the 460–480nm wavelength range. Cognitive arousal (measured by EEG) was also higher after LED screen exposure, suggesting blue light affects both hormonal and neurological sleep readiness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShechter A, Kim EW, St-Onge MP, Westwood AJ\u003c\/strong\u003e (2018). \u003cem\u003eJournal of Psychiatric Research\u003c\/em\u003e\u003cbr\u003eWearing amber-tinted blue-light-blocking glasses for 2 hours before bed for 7 nights significantly improved sleep quality and mood in patients with bipolar disorder and insomnia. This demonstrated that the effect of blue-light filtering extends beyond sleep latency to clinically meaningful mental health outcomes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTosini G, Ferguson I, Tsubota K\u003c\/strong\u003e (2016). \u003cem\u003eMolecular Vision\u003c\/em\u003e\u003cbr\u003eBlue light exposure causes retinal damage through photochemical mechanisms involving reactive oxygen species in retinal pigment epithelial cells. The damage is cumulative and wavelength-specific, peaking at 415–455nm. Long-term implications include increased risk of age-related macular degeneration. The authors recommended reducing blue light exposure during evening hours.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEso World\u003c\/strong\u003e publishes every material in every product. The full materials list, exclusion list, and citations live on the product page.\u003c\/p\u003e","brand":"Eso World","offers":[{"title":"Default Title","offer_id":54111653232980,"sku":"FP-BLUELIGHT_GLASSES-RED_LENS","price":34.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/5655\/7908\/files\/f118016.jpg?v=1775337012"},{"product_id":"silk-pillowcase-100-mulberry-silk","title":"Silk Pillowcase | 100% Mulberry Silk","description":"\u003cp\u003eMulberry silk, plant-based dyes, Oeko-Tex Standard 100. Every material on the page.\u003c\/p\u003e\n\u003cp\u003eMost ‘silk’ pillowcases sold online are polyester in a satin weave — a petroleum-derived fabric that traps heat and drags at hair and skin overnight. This is the same 22 momme mulberry silk used in the Eso World Sleep Mask, made by the same supplier.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003e100% mulberry silk\u003c\/dd\u003e\n\u003cdt\u003eDyes\u003c\/dt\u003e\n\u003cdd\u003ePlant-based, GOTS-compatible\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eMaterials\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eMulberry Silk\u003c\/strong\u003e (100%) — \u003cem\u003eFace \u0026amp; reverse\u003c\/em\u003e\u003cbr\u003eThe same 22 momme mulberry silk as the Eso World Sleep Mask, from the same supplier. Mulberry silk is a natural protein fibre with the lowest friction coefficient of any common textile (Kaplan \u0026amp; Okur, 2008) — less mechanical drag against hair and skin overnight than cotton or polyester. Naturally hypoallergenic — silk protein resists dust mites, mould, and bacterial colonisation. Temperature-regulating — breathes and wicks moisture rather than trapping heat and sweat the way polyester does.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eWhat we left out\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolyester labelled ‘satin’\u003c\/strong\u003e \u003cem\u003e(Fabric)\u003c\/em\u003e\u003cbr\u003e‘Satin’ is a weave, not a material — most pillowcases marketed as silk or satin are polyester. This one is 100% mulberry silk, the same material and supplier as the Eso World Sleep Mask.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynthetic and azo dyes\u003c\/strong\u003e \u003cem\u003e(Dyes)\u003c\/em\u003e\u003cbr\u003ePlant-based dyes only. Azo dyes can release carcinogenic aromatic amines under skin contact and perspiration — restricted in the EU but common in imported bedding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormaldehyde wrinkle-free treatments\u003c\/strong\u003e \u003cem\u003e(Processing)\u003c\/em\u003e\u003cbr\u003eLow-grade imported silk often uses formaldehyde resins for wrinkle resistance — releases formaldehyde with body heat and perspiration over a full night’s contact. GOTS-compatible processing only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-breathable synthetic backing\u003c\/strong\u003e \u003cem\u003e(Construction)\u003c\/em\u003e\u003cbr\u003eSome ‘silk’ pillowcases blend or back the fabric with polyester to cut cost, which reintroduces heat-trapping and microplastic shedding on the exact surface that touches your face for 8 hours. This one is 100% mulberry silk throughout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy we built it this way\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e100% mulberry silk — not polyester labelled ‘satin’ (satin is a weave, not a material)\u003c\/li\u003e\n\u003cli\u003eSame 22 momme silk and supplier as the Eso World Sleep Mask\u003c\/li\u003e\n\u003cli\u003eLower friction against hair and skin than cotton or polyester (Kaplan \u0026amp; Okur, 2008)\u003c\/li\u003e\n\u003cli\u003eHypoallergenic — silk protein naturally resists dust mites, mould, and bacterial growth\u003c\/li\u003e\n\u003cli\u003eTemperature-regulating — breathes and wicks moisture rather than trapping heat and sweat\u003c\/li\u003e\n\u003cli\u003ePlant-based dyes only — no synthetic colourants, no azo dyes, no heavy metal pigments\u003c\/li\u003e\n\u003cli\u003eHand wash only — silk is a natural protein fibre that degrades in machine wash. This is by design, not a limitation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to use\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit it to your pillow\u003c\/strong\u003e\u003cbr\u003eSlide the pillow in the same way as any pillowcase.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand wash weekly\u003c\/strong\u003e\u003cbr\u003eCool water, mild detergent, press dry between towels. Don’t wring silk — it weakens the fibres.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eIs there a difference between silk and satin pillowcases?\u003c\/h3\u003e\u003cp\u003eYes — and it’s the single biggest thing to check before buying. Satin is a weave, not a material. Most pillowcases sold as ‘silk satin’ or ‘satin’ are polyester in a satin weave. Real mulberry silk is a natural protein fibre — hypoallergenic, temperature-regulating, with the lowest friction coefficient of any common textile (Kaplan \u0026amp; Okur, 2008). This one is 100% mulberry silk, the same material as the Eso World Sleep Mask.\u003c\/p\u003e\u003ch3\u003eDo silk pillowcases actually reduce hair breakage and skin creasing?\u003c\/h3\u003e\u003cp\u003eThe mechanism is friction. Cotton has a higher coefficient of friction against hair and skin, which is what causes tangling and the crease line visible each morning. Silk’s lower friction coefficient (Kaplan \u0026amp; Okur, 2008) means less mechanical drag as you move in your sleep.\u003c\/p\u003e\u003ch3\u003eHow do I wash it?\u003c\/h3\u003e\u003cp\u003eHand wash in cool water with mild detergent. Don’t wring — press gently between towels. Air dry flat. Machine washing degrades silk protein fibres.\u003c\/p\u003e\u003ch3\u003eIs it the same silk as the sleep mask?\u003c\/h3\u003e\u003cp\u003eYes. Same 22 momme mulberry silk, same supplier, same plant-based dyes.\u003c\/p\u003e\u003ch3\u003eWhat size pillow does it fit?\u003c\/h3\u003e\u003cp\u003eIt’s sized to fit a standard pillow. Exact finished dimensions are being confirmed with the supplier — check back on this page or contact us before ordering if you need a precise measurement for an oversized or specialty pillow.\u003c\/p\u003e\n\u003ch2\u003eResearch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKaplan S, Okur A\u003c\/strong\u003e (2008). \u003cem\u003eFibres and Textiles in Eastern Europe\u003c\/em\u003e\u003cbr\u003eMulberry silk has a lower coefficient of friction than any common textile fibre including cotton, polyester, and nylon. The smooth protein surface reduces mechanical irritation on skin and hair contact. For a fabric in contact with hair and skin for 8 hours nightly, friction coefficient directly determines whether the material causes creasing, tangling, and irritation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNapper IE, Thompson RC\u003c\/strong\u003e (2016). \u003cem\u003eMarine Pollution Bulletin\u003c\/em\u003e\u003cbr\u003eA single polyester garment sheds up to 700,000 microplastic fibres per wash. Natural fibres such as silk and cotton biodegrade; synthetic fibres do not. Polyester ‘satin’ pillowcases are cut from the same shedding synthetic fabric class, in direct overnight contact with skin and airways.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVepari C, Kaplan DL\u003c\/strong\u003e (2007). \u003cem\u003eProgress in Polymer Science\u003c\/em\u003e\u003cbr\u003eSilk fibroin is a natural protein biopolymer whose amino-acid-driven crystalline and amorphous structure underlies its combination of mechanical strength, biocompatibility, and moisture-handling behaviour — properties that differentiate natural silk from petroleum-derived synthetic fibres used in most ‘silk-look’ textiles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEso World\u003c\/strong\u003e publishes every material in every product. The full materials list, exclusion list, and citations live on the product page.\u003c\/p\u003e","brand":"Eso World","offers":[{"title":"White \/ Single","offer_id":56391467663700,"sku":"FP-SLK_PLW-WHT","price":39.99,"currency_code":"GBP","in_stock":true},{"title":"Sage \/ Single","offer_id":56391467696468,"sku":"FP-SLK_PLW-SAGE","price":39.99,"currency_code":"GBP","in_stock":true},{"title":"Cream \/ Single","offer_id":56391467729236,"sku":"FP-SLK_PLW-CREAM","price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/5655\/7908\/files\/104A7970_73f2af51-8420-49d2-bcf5-870f1e1b2edf.jpg?v=1783544297"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/5655\/7908\/collections\/eso-sleep-wellness-card.png?v=1784714357","url":"https:\/\/esoworld.myshopify.com\/collections\/sleep-wellness.oembed","provider":"Eso World","version":"1.0","type":"link"}