Rayon Derived from Bamboo PROTECT YOUR MATTRESS - Extend the life of your mattress with our Zippered Mattress Encasement. Crafted with six-sided protection, a durable zipper, and 360-degree secure velcro enclosure to seal off the end of the zipper. Top Outer Lining: 70% Rayon derived from Bamboo / 30% Polyester; Bottom and Side Outer Lining: 100% Polyester; Inside Lining: 100% Waterproof TPU prevent-s protect-s safeguard-s guard-s -s resist-s fluid-s liquid-s spill-s stain-s accident-s night-s protector-s cover-s sleeper-s pillow-s depth-s urine messes perspiration sweat premium coating waterproof noiseless breathable great kids pets incontinence fitted sheet style design protector deep pockets comfort soft blended extra absorbent cozy top high quality seam construction stops liquids passing elastic band secure fit protection flexible vinyl-free secured place mattresses mattress pad tight barrier cover comfortable quiet sleep smooth brushed finish bed peaceful washable dryer heat organic cooling channel-weave air flow ventilated hot noise restful super ultimate feeling breath pocket hugs thicknesses services softer accidental silent natural combination ultra-moisture wicking function relatively fillings excellent delicate made in usa queen size cal california king crib toddler full queen twin-xl white