If you're looking for a heavy-duty institutional quality mattress cover, you've come to the right place. These vinyl covers are extremely durable and can be made to fit on 9”, 12” or 16” depth mattresses. The seams have been electronically welded to prevent moisture leaks, bed bugs, and dust mites. Zippered covers also protect from spills, stains, bedwetting and allergies Ultra-Fresh, an anti-bacterial treatment, retards mildew, mold and fungi.. These heavy-duty vinyl covers stand up to even the most rugged conditions! Easily wipe clean with a damp cloth.