UltraBlock King Size Waterproof Mattress Protector - Premium Soft Cotton Terry Cover 100% Cotton Terry Surface / 100% Safe Polyurethane 20 YEAR WARRANTY and a full ONE YEAR MONEY BACK GUARANTEE for the best mattress protection available. FINEST QUALITY MATERIALS make this premium protector YOUR BEST CHOICE. 100% WATERPROOF barrier. Get peace of mind knowing your mattress is protected from liquids, spills, urine, accidents and more. Extremely quiet with NO CRINKLING, making it MORE COMFORTABLE. HYPOALLERGENIC cotton terry top plus hi-tech backing keeps you and your family safe by ELIMINATING DUST MITES & their ALLERGENS. Helps prevent and protect from mold, mildew and bacteria. SAFE, NON TOXIC and does not contain PVC's, phthalates, or vinyl. FITTED SHEET STYLE COVER is MACHINE WASHABLE. Strong, tight fitting elastic secures cover to stay in place - will not slip or bunch up. Stretchable DEEP POCKET SKIRT fits todays thicker mattresses up to 18 thick and is designed to make it easy to put on and take off. ADVANCED TECHNOLOGY allows the water proof barrier to breathe while the soft cotton terry surface wicks away moisture helping to KEEP YOU COOLER AND SLEEP BETTER.