"Good Housekeeping Tested & Verified. The experts at Good Housekeeping Magazine have called our 100% pure mulberry silk pillowcase a ""winner"" and ""all-star standout"". LUXURY BEDDING Our pillowcase is made of 100% long pure mulberry silk, grade 6A. There is silk on both sides of the cushion cover. The density of silk is measured in momme. The higher the momme, the more silk. We added a unique side entry that is slightly offset. The cushion cover can be used as both a cushion cover and a pillowcase. An oversized envelope flap ensures that the pillow stays securely in your pillowcase. HEALTH BENEFITS 100% pure mulberry silk has been tested and proven to prevent wrinkles, regulate sleep temperature, protect hair damage and retain moisture. SIZES Our standard measures 20 x 28 inches, Queen pillowcase measures 20 x 30 inches and King 20 x 36 inches. CARE INSTRUCTIONS Dry clean or hand wash are the best methods. You can also machine wash on a gentle cycle. We recommend using a mesh wash bag. Lay flat to dry."