DreamSerene Smooth Sleep Hypoallergenic, Waterproof and Breathable Mattress Protector, King, White 100% polyester Imported Wet block technology is breathable, noiseless and protects the mattress from spills, incontinence and normal body moisture that occurs during sleep Allergy shield creates a barrier between you and the mattress to protect against dust mites and allergens; Great for those with allergies and asthma Smooth, ultra-thin fabric will not change the feel of your mattress Fitted sheet style fits mattress depths up to 18" for twin, twin xl and full, and up to 22" for queen and king sizes Machine wash in hot water; Tumble dry low temperature