Honeylux envelope style pillowcases use the highest grade (deluxe quality) of 6A 22momme mulberry silk and are delicate yet long-lasting for your beauty sleep. This real silk pillowcase helps with anti-acne and anti-aging and comes with a beautifully crafted gift box. Real silk is gentile and allows an easy glide on the skin. Cotton and other materials create friction and over time, contribute to wrinkles and tired eyes. Silk has amazing antibacterial properties and does not promote the growth of acne-causing bacteria.  Size: King. Fabric Content: 100% mulberry silk - 22 momme 6A grade. Care Instructions: Handwash with lukewarm water, PH neutral detergent, air dry, and steam as needed.