100% Mulberry Silk, 30mm Imported CERTIFIED & TESTED: Our product is tested against over 1,000 harmful substances by OEKO-TEX STANDARD 100. Suppliers in a MADE IN GREEN by OEKO-TEX certified supply chain must take actions to protect workers, ensure safe working conditions and strengthen healthy labor practices. LUXURIOUS BEDDING: Our pillowcase is made of 100% long strand, Grade 6A Pure Mulberry Silk. There is silk on BOTH sides of the pillowcase! The density of silk is measured by momme. The higher the momme, the more silk. We have added a unique side entry that is slightly offset. The pillowcase can be used as both a sham and pillowcase. An oversized envelope flap ensures the pillow will remain securely inside your pillowcase. BEAUTY BENEFITS: 100% Pure Mulberry Silk has been tested and proven to Prevent Wrinkles, Regulate Sleep Temperature & Protect Hair Damage. SIZING: Our Standard measures 20" x 28", Queen pillowcase measures 20" x 30", and King measures 20" x 36". CARE INSTRUCTIONS: Dry clean or hand wash are the best methods. You can also machine wash on the gentle cycle. We suggest using a mesh wash bag when do so. Lay flat to dry. Our most luxurous pillowcase is the 30 Momme 100% Mulberry Silk Pillowcase from our Black Label Collection. Our design team sampled dozens of pure mulberry silk before making our selection. The silk we selected is constructed of the most luxurious threads we could find creating an unparalleled, blissful sleeping experience. Our silk is constructed from long strand, Grade 6A mulberry charmeuse silk. Silk quality is measured in the standard unit known as momme. The higher the momme, the more the silk. Our 30 momme pillowcase has 58% more silk than a 19 momme pillowcase. Our unique design incorporates a side entry, slightly offset, allowing this pillowcase to be used as both a sham or pillowcase. Our oversized envelope flap ensures the pillow will remain securely inside your pillowcase while allowing you to sleep on either side. Silk is proven to provide many beautify benefits including: preventing wrinkles, hair damage and regulating sleep temperature.