{"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","url":"https:\/\/esoworld.myshopify.com\/products\/silk-pillowcase-100-mulberry-silk","provider":"Eso World","version":"1.0","type":"link"}