Sentinel Mattress ZipCovers provide the perfect physical layer to protect against Bed Bugs, Dust Mites and Allergens. Sentinel is constructed of the patented Evolon fabric which features breathable cotton-like comfort resulting from unique microfilament technology. Evolon's filtration ability comes from its dense, compact structure of tightly entangled microfilaments. Sentinel provides superior moisture management. Sweat is absorbed by the Evolon fabric, drying quickly and wicking moisture from skin. It also helps prevent skin contact irritations. This patented fabric is created from a solvent and binder -free process using only stable raw materials that are environmentally safe. German engineering gives you the best product in the Sentinel Mattress ZipCover. Color: WHITE.