Multi-purpose seat cushion: The memory foam seat cushion is thinner in the front and thicker in the back, and the front of the seat cushion narrows to 0.6 inches under the legs to avoid pressure under the thighs. It can also be used as a lumbar cushion to fill the gap between the lumbar vertebrae and the rear seat to relieve the lumbar spine caused by long-term driving. Improved viewing angle: Our car seat cushions are perfect for short people. Our car seat cushions are 3.5 inches thick and serve as a seat booster, which provides a viewing angle of a few inches. Ergonomic design: This ergonomic seat cushion uses slow-release memory foam to provide you with firm support and keep your shape for a longer life. Large opening zipper, easy to remove the cover for cleaning. Breathable fabric keeps you cool even in hot weather. Driving Comfort: This cushion size is 440 x 240 x 95 mm. It is the perfect driver's seat cushion (lumbar support cushion) for better vision, posture and pain relief during short or long car journeys. It is a must-have for car travel. Perfect Gift: Give this mat to your loved one as a thoughtful gift to face slightly different scenes and enjoy life.