Milliard Premium Terry Hypoallergenic 100-Percent Waterproof Mattress Protector, King cotton Our mattress protector is made of a waterproof membrane topped with a cotton terry knit surface that naturally absorbs fluids Hypoallergenic great for asthma, eczema and allergy sufferers. Protects against allergens, dust mites and bacteria Completely noiseless for uninterrupted sleep Breathable; will not cause you to sleep hot. Fitted sheet style 80% Cotton; Machine washable, tumble dry low (Phthalate, Vinyl And PVC Free)