Features: Multi purpose seat cushion: memory foam seat cushion is thinners in front and thicker in the rear, and the front of seat cushion gradually becomes thinners to 0.6inches belows the legs to prevent pressure under the thighs. It can also be used as a lumbar support pillow to fill the corner between the lower back and the seat backrest, alleviating lumbar pains caused by prolonged driving. Our car seat cushion has a thickness of 3.5inches and can be used as a seat lift, providing a few inches of lift to improve your perspective. Ergonomic design, this ergonomic seat cushion has a slow rebounds memory foam, which provides you with firm support and keeps shape, and has a longer service life. The large opening zipper design makes it easy to remove the cover for cleaning. Even in hot weather, breathable fabric can keep you cool. The inner core cannot be washed with water and can be placed in a ventilated place to dry. The pillowcase can be washed with water. Specifications: Material:Memory Foam Color:Black,Red,Khaki,Brown Thickness:3.5Inches Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Car Seat Wedge Pillow