The Opossum by Protect-A-Bed Cotton Terry Waterproof Mattress Protector King Bed has a soft surface for natural comfort, designed to protect your mattress and improve your quality of sleep. This mattress protector is easy to care for and can be machine washed and tumble dried. With unique Multishield properties, protect your mattress from spills and stains and your family from dust mites, mould and bacteria allergens.