The britax seat saver waterproof liner is designed with deep sides to fit securely into the seating area of your car seat to contain liquids and crumbs and keep your car seat clean. Perfect to protect from diaper leaks, potty training accidents, and wet bathing suits, the waterproof design is made out of ez-dry wicking fabric to pull moisture away from your child and keep the seating area dry and comfortable. It can then be easily removed and machine washed and dried for a quick and easy clean-up. It also has a textured bottom to prevent from slipping out of position. The britax seat saver is compatible with any harnessed car seat or stroller and has been crash tested and approved for use with all britax harnessed car seats.