The AllerEase Waterproof Mattress Protector features a brushed polyester top for quiet comfort and is waterproof to protect your mattress from spills, stains, urine, and perspiration. The tightly knit fabric and durable zippered closure block out dust mites, pollen, pet dander and other household allergens that can trigger asthma and allergies from settling in your mattress. The AllerEase Waterproof Mattress Protector fully encases your mattress with a durable zippered closure that provides a six-sided layer of protection between you and the allergens that collect in your bedding, while preventing new allergens from entering.