Your baby deserves a healthy, clean environment for sleeping. Prevent your mattress from becoming a breeding ground for nasty dust mites and more! Our mattress covers keep dust mites, allergens, bacteria, and germs out of your mattress. These can cause eczema breakouts, asthma attacks, allergic reactions and other nighttime discomfort. Runny noses, itchy skin, and breathing troubles can disrupt rest. 100% waterproof protection locks out spills, urine, perspiration, sweat, and other body fluids.