SkinBiome. Satin Pillowcases for Hair and Skin 100% Woven polyester, soft and silky pillowcases that minimize hair breakage and loss Satin pillowcases create less friction, which helps hair retain moisture Satin is great for reducing skin creasing and scratched skin while you’re resting. It is cooling in the summer and warm in the winter, so satin is a must-have for skin and hair. Wash pillowcase inside out in a mesh bag on the delicate cycle. Use a mild detergent for best results. Envelope closure for maximum comfort with no zippers to bother you while you sleep. Set includes 2 Satin Pillowcases for Hair and Skin Standard: 26×20 inches Queen: 30×20 inches King: 40×20 inches