The Sleep Tite Mattress Protector will protect you and your mattress. Its 100% waterproof material gives protection from any and all liquid spills. The average person loses up to 1 liter of liquid in a night; conveniently, this protector is able to absorb up to 1 liter of liquid. The 100% cotton terry surface is backed by a polyurethane membrane. Let's break that down- the 100% cotton terry makes the surface soft, quiet and breathable. The polyurethane membrane has microscopic pores to allow air passage but block liquid. This protector carries a 15-year warranty so you know we're not afraid to stand by this product. Every night you shed thousands of skin cells, lose about 1 liter of water and liquid spills just happen. Sleep Tite Mattress Protector is about more than just protecting your mattress- it protects you while you sleep by preventing the accumulation of moisture and skin flakes in your mattress. Moisture and skin flakes are a recipe for bacteria and dust mites. Exposure to dust mites has been proven to lead to the development of asthma in young children, is a common trigger for asthmatics and is a leading cause of eczema. The Sleep Tite Mattress Protector cuts off the food supply to dust mites, making it impossible for them to thrive. Care for the protector is simple as it is machine washable, but this important feature allows you to periodically remove these hazards from your sleeping environment. Here's another bonus. The unique design allows body heat to pass through to the mattress and disperse, maintaining a comfortable sleeping environment. The ultra-thin fabric dynamically conforms to the natural shape of the mattress providing you with a healthy, restful sleep that won't change the feel of your bed but is 100% waterproof, breathable and noiseless. Protect you and your mattress by applying a Sleep Tite Mattress Protector. This includes one Cal King (72" x 84") mattress protector.