Levinsohn Allergy Guard Mattress Protector Cover 3 Layer Technology, Full Encasement, Hypoallergenic, Full, White 3 LAYER PROTECTION - Mattress protector utilizes a 3 layer micro-porous fabric to keep allergens, dust, and dirt out. ZIP CLOSURE - Zipper keeps mattress in place and dirt free. Easy to remove for cleaning. FULL ENCASEMENT - Mattress protector wraps completely around your mattress protecting against small unseen allergens and debris. SOFT AND QUIET - Mattress cover is made of a 50 % polypropylene and 50 % polyethylene blend and wont make noise during sleep. WATER RESISTANT - Hypoallergenic full mattress cover is water resistant protecting your mattress from moisture.