No need to fear the bedbugs will bite. For maximum protection against bedbugs, dust mites and allergens, this unique fabric: Cotton Jersey on top with a waterproof bottom barrier, fully encases your mattress with an impermeable barrier. Combined with an exclusive zipper lock system, it totally blocks entry. Absorbent and 100% waterproof, it provides a cool, quiet sleeping surface (unlike plastic), that’s as breathable as your skin. Also available in pillow protectors, so you and your family can truly rest assured. Imported. Expandable from 10" - 15" depth by opening a zipper. Machine washable.