The unique, reversible design of PureCare's 2-in-1 ReversaTemp mattress protector provides a customizable solution for sleep surface temperature control while helping you create a cleaner, more hygienic sleep environment. Protection Benefits: The 5-Sided design provides a physical barrier against allergens, dust mites, stains, moisture, mold, and mildew on the top and sides of your mattress. Our whisper-quiet and breathable OmniGuard Advance lightweight performance fabric is specifically designed to be washed and dried on hot settings for optimal sanitization. Only our ReversaTemp protector features Precision-Fit corners and a 1? elastic cuff to ensure that your protector fits like a fitted sheet. Temperature Control Benefits: Completely reversible, our 5-Sided ReversaTemp protector features two distincly different surfaces, allowing you to easily choose between a cooling or warming sleep surface. The cooling benefits of our FRIO fibers and the warming benefits of our HeatStar fabric never wash out and last the lifetime of the protector. PureCare's entire collection of mattress and pillow protectors are the official protectors of both the National Sleep Foundation and the Women's Choice Award. All PureCare protectors are treated with antimicrobial silver chloride that inhibits bacteria, mold, and mildew that causes deterioration, stains, and odors on this product.