The waterproof invisible barrier of the Twin Dri-Tec Mattress Protector reduces the build-up of allergens in your bed, as well as resists liquids and stains. The flex and fit motion-activated technology allows all-way stretch to provide resistance-free comfort while you sleep. Featuring flex and fit motion activated technology, our StretchWick fabric construction creates rapid moisture transfer to keep you and your mattress dry. With a breathable waterproof barrier to protect your mattress, all-way stretch provides resistance-free comfort with constant air flow.