Sterling Hospital mattress covers are fully removable and feature box-stitched black webbing handles and count tooth YKK heavy-duty zippers with water repellant flap. Our covers feature waterproof urethane-coated ChemFlex II, triple laminated Chemsafe 2000, and an anti-microbial, anti-bacterial treated stretch cover. In addition to this; we also install a black nonskid patch made of premium Belgian ChemCare Davos to reduce mattress movement on the bottom of the cover panel. This helps the mattress stay put when used with an elevating base. The cover is fully removable and replacement foam comfort layers are available for purchase separately.