PureCare's clinically proven total encasement mattress covers offer our best level of protection by covering all six sides of your mattress. Our encasements feature MiteTight® seams and a locking zipper, providing a physical barrier against allergens, bed bugs, dust mites, stains, moisture, mold and mildew. Our clinically proven OmniGuard® Advance lightweight performance fabric is approved for all mattress types and won't alter the feel or comfort of your mattress. Completely washable, our encasements are specially designed so that you can wash and dry on hot settings for optimal sanitization. PureCare's total encasement mattress protectors are treated with antimicrobial silver chloride that inhibits bacteria, mold and mildew that causes deterioration, stains and odors on this product, allowing you to create a cleaner sleep environment in every bedroom in your home. Additionally, our clinically proven protectors are the official mattress protectors of both the National Sleep Foundation and the Women's Choice Award.