Introducing the coolest beauty pillowcase in town. Our proprietary weave of Silk + Cooling Nylon is silk innovation at its finest. Thanks to the natural thermoregulation properties of the fibers – it s 42% cooler to the touch than cotton & stays cooler 20% longer than other pillowcases.Also, the frictionless surface & 6A grade quality silk provides countless beauty benefits including reducing fine lines, hair breakage & breakouts. Durable & machine washable. Trust & believe, this pillowcase won t disappoint.