Totally encase your mattress to provide breathable, quality protection from bed bugs, dust mites, allergens, and accidents. The HD includes a 360° MicroTite™ zipper so you can effortlessly zip off the top half for easy laundering. Completely encase your mattress for the most protection from bed bugs, dust mites, allergens, and accidents Smooth polyester top won’t change the feel of your mattress and is soft, quiet, and breathable Laboratory-certified H2Pro™ liquid-proof membrane creates a 100-percent waterproof barrier 360° MicroTite™ zipper allows you to zip off the top half of your protector for convenient laundering Hypoallergenic protector is easy to remove, machine washable, and dryer safe to keep your mattress fresh