The BRITAX Seat Saver waterproof liner is designed with deep sides to fit securely in the seating area of your car seat to contain liquids and crumbs and keep your car seat clean. Perfect for protecting against diaper leaks, potty training accidents and wet bathing suits, the waterproof design is made with EZ-Dry absorbent fabric to wick moisture away from your child and keep the seating area dry and comfortable.