Want the ultimate protection for your mattress and bed pillows? Permashield represents a break through in technology. It"™s long lasting protection helps protect against common bacteria, dust mites, bed bugs, Mosquitos, Fleas, & Tics. Plus it''s highly water resistant. This is our best polypropylene fabric - incredibly strong and long lasting. The protector slides onto mattress and pillows and then zips shut for total protection. Set contains: 1 mattress protector and 2 pillow protectors (1 with Twin & TXL). Fits mattresses up to 15" deep. Velcro at the closure point adds to complete encasement. 100% Polypropylene. Machine wash and tumble dry.