"The Prime™ Smooth mattress protector features a hypoallergenic and a breathable, smooth fabric surface that sleeps comfortably and will not change the feel of the mattress. It also features the laboratory-certified H2Pro™ liquid-proof membrane which creates a quiet, and breathable barrier against allergens and dust mites while allowing for airflow. Making Your Mattress Protector Waterproof Polyurethane is the cleanest, safest, and most durable water barrier available on the market today. It is 100% waterproof, breathable, inert, free of VOCs & PVC, burns clean, and doesn't off gas or leach chemicals. The universal fit elastic ensures a secure fit for mattress depths of 6""-22"". Pillow protectors are also available to create a healthy sleeping environment. Not sure of your bed size? Consult our size guide below for mattress measurements before purchase. INCLUDED: Thin, smooth surface Breathable and 100% waterproof Allergen and dust mite proof Liquid-proof yet breathable Light, smooth polyester fabric with a breathable weave will not change the feel of your mattress Laboratory-certified H2Pro™ liquid-proof membrane is quiet and breathable Universal fit elastic ensures a secure fit for mattress depths 6""-22"" Available in pillow protectors Care: Machine wash warm or cold, dry low. No bleach. *Warning: using high heat or harsh chemicals like bleach will cause the waterproof barrier to blister and peel voiding the 5 year warranty. Exchange / Return Policy: Protectors can be returned in new, unopened condition for an exchange or refund minus round trip shipping costs. Once opened, protectors are no longer returnable. Please call 1-888-758-7423  for assistance. Size Guide "