PROFESSIONAL DESIGN- According to the research of the particular sitting posture in a car, we design this mini lumbar support cushion to fill up the empty space of the back of the buttocks when seated, release the pressure on your lumbar and hip when the vehicle is bumpy or making turns. 100% PURE MEMORY FOAM- Memory foam was developed to absorb shock and offer improved protection and comfort in NASAs airplane seats. It enhances the driver comfort on long-term driving, due to an even distribution of body weight and pressure over the entire contact area. ORTHOPEDIC DOCTOR RECOMMENDED- High Density Memory Foam Lower Back Pillow with Ergonomic Streamline is recommended by orthopedic doctors for lower back and hip pain relief. It is thin and makes your driving more comfortable rather than thick ones that will push you off your seat. MULTIPURPOSE USE- Our memory foam backrest lumbar support pillow can be used in multiple places. Whether as lumbar support for cars, or as back support for recliners/beds, it offers top comfort anytime.