SafeRest Encasements Protect Your Mattress Against Fluids. Through extensive research and development, SafeRest has created a better way to protect your mattress. Those who perspire while sleeping or have children, pets or incontinence will also benefit from SafeRest's waterproof technology. Our encasements were specifically designed combining cutting edge Micro-Zippers along with breathable fabric. Rather than disposing of expensive unprotected mattress sets, SafeRest encasements seal and safeguard your mattress. Soft Cotton Terry Surface - Breathable, Cool and Noiseless. To keep our encasements cool and noiseless, the surface material is made with soft cotton terry back coated with a breathable 100% waterproof membrane layer. Our premium cotton terry naturally absorbs moisture and is completely noiseless. Exclusive 360 Secure Velcro Flap with Exclusive Micro-Zipper. Our patented 360 Secure Velcro flap protects the zipper from accidental openings. Machine Washable. Machine-wash with your sheets using normal household detergents that do not contain bleach. Tumble dry on low heat. Do not iron. SafeRest encasements contain no vinyl, phthalates, flame retardants or PVCs and are backed by a full replacement 10-year warranty