The All-In-One Bamboo Comfort Mattress Protector with Bed Bug Blocker, provides powerful protection against bed bugs, dust mites and other allergen irritants. We begin with a soft knit bamboo-derived cotton-blend fabric and line it with a special permanent coating. This coating, along with our double sewn seams, provides a complete barrier. The encasement closure is extra secure and features a triple-seal closure system which has an inner flap, a hook & loop hidden seal and a nylon zipper to block bed bugs and dust mites, as well as allergy irritants. Bamboo-derived cotton-blend fabric sleeps cool and wicks moisture for an optimal sleep experience. The stretch sidewalls neatly fit most mattresses/box springs up to 15 inches. Available in Twin, Twin XL, Full, Queen, King and California King sizes. Cover: 70% Cotton/30% Rayon made from Bamboo; Lining: 100% Polyurethane; Reverse: 50% Polypropylene/50% Polyethylene; Sidewall: 100% Polyester. Machine wash cold. Permanent press cycle with like colors. Do not bleach. Tumble dry no heat. Do not iron. Do not dry clean. Imported.