Brooklyn Bedding Zip Tight Mattress Encasement, King, White Zip tight enclosure encompasses your entire mattress for maximum protection Hypoallergenic and waterproof to protect your mattress against bacteria, bed bugs, dust mites and all types of liquids or moisture Breathable materials to ensure that the intended feel of your mattress will not change 100% polyester construction provides a crisp, soft hand that is reistant to shrinkage Washable, tumble dry low