Greenzone Sleep Plus Classic Design Jersey Fitted Waterproof Mattress Protector, King "56% Rayon;24%cotton;20% Polyester" Imported Cotton and Rayon extracted from Bamboo fiber ensures mattress protector is super soft and repels as well as eliminates dust mites 100%waterproof and hypoallergenic Fitted sheet style, deep pocket fit Machine washable and dryable 20 year warranty null null null null null