BeautySleep Waterproof Mattress Protector Premium Hypoallergenic Cover - Assorted SizesMade of cotton terry surface and TPU membrane back coating. With authoritative organizations certification, the TPU is certified by SGS, which can resist the infestation of bacterial from all sides so that ensure the healthy sleep for you. Features: Allows air and heat to pass through, keeps your bed cool and dry Free from Vinyl, PVC, Phthalates and toxic chemicals The mattress protector is soft and smooth, without changing the feel of your mattress