Secure A Bed Mattress Protectors (Non-Zippered) Size 39x75 King 100% water proof, Protects against dust mites, allergens, bacteria, and perspiration. cotton Imported PROTECTS - Against Dust Mites, Allergens, Bacteria, and Perspiration. 100% WATER PROOF - With membrane coating. Hypoallergenic Terry Cotton surface. EASY CARE - Wash and tumble dry. GREATE COMFORT SLEEP - Noiseless and breathable. This is A none zippered encasement, just a mattress protector