RELIEVE TIRED LEGS AND HIPS: If you drive for long durations, sitting related aches and problems can cause you a lot of discomfort. The RaoRanDang car seat cushion is designed for people who sit or drive long hours. It helps prevent sitting related aches and numbness. | 100% MEMORY FOAM CUSHION : Combination of three layer design will make your car seat much more comfortable. Waterproof, dustproof