Aller-Free Microfleece Waterproof Mattress Protector, King, White 100% Polyester Imported The Aller-free 100% Waterproof Mattress Protector is an economical solution to add longevity and protect your mattress investment Constructed with a whisper quiet waterproof backing that is laminated to the soft fleece top giving you and your family a more peaceful nights sleep Breathable design protects the mattress against accidental spills and incontinence but still allows air to flow through your mattress keeping it fresh Extra deep stretch skirt fits up to 22" mattresses; Great to use in addition to your favorite mattress pads, enhancers and toppers King size measures 78"-by-80"; Hypoallergenic for the sensitive sleeper; Machine washable in warm or hot water; Tumble dry on low heat