The Prince LionHeart 2 Stage Seat Saver has two stages that grow with your child! The high-density foam construction of the Prince LionHeart 2 Stage Seat Saver prevents depression damage that is caused by car seats. The bottom tray keeps all cars seats level and in proper position, and the kick plate protects upholstery from shoe scuffs. Fits most car seats & most cars. Stage 1 - Bottom tray is used alone with rear facing infant seats. Stage 2 - Back attaches to the bottom tray for use with forward facing toddler and booster car seats. Prince LionHeart Seat Saver Features: Specifically designed for compact cars and forward facing car seats and boosters.