Mattress Protector Dust CoverThis mattress protector is structured into three layers First layer: 100% Class A raw cotton(soft and fluffy, you can easily fall into a deep sleep) Second layer: antibacterial anti mite fiber(antibacterial rate up to 99%, mite removal rate up to 93%, healthy and hygienic) Third layer: TPU nano waterproof layer( The pore size is bigger than air molecules but smaller than water molecules, so its breathable and not stuffy with good waterproofing) Key