A one piece cushioning device (12) for a child's car seat (10) has a main body (46) defining a head rest and a pair of extending arms (48, 50) that define a pair of shoulder belt covers. Each arm is sized and shaped to fit around a shoulder (28, 30) of the car seat, closures being provided to secure the arms around the shoulder belts. The main body is positioned between a child's head and the back of the car seat and serves as a cushion to protect against irritation to the child's head and the arms protect against irritation to the child's back.
