Premium Sheet Protector with Flaps is placed over the bottom sheet to protect your mattress and sheets from leaks and stains. Our vinyl backing is phthalates, latex and BPA free. The vinyl backing is a safeguard certified product that ensures that each mattress cover provides a safe and healthy sleeping environment. Our design can absorb 8 cups of liquid. Each pad is made to withstand up to 300 washes, is washer and dryer friendly.