[Design features] The ultimate in car seats, stadium seat pads, wheelchair accessories or aeroplane supports.The wedge is designed with a tilt which aligns the pelvis and spine in the correct position. [Machine Washable] With the removable cover,our cushion is very easy to clean, unzip and remove the cover and wash it by hand or with a washing machine. [Premium Material] The seat leveling pad is made from premium polyester, filled with High Density Foam, not easy to collapse or deform, ensuring comfortable and long term use. [Versatile Seat Pad] Our support pillows for back, neck, hips, and shoulder pain, lumbar support, sciatic relief remains its density even after a long use. Conforms to your shape to reduce pressure points, help increase blood flow. comfort and alignment you need for ultimate relaxation. [Material] Wedge Pillow is made with premium high-density foam, which is super soft supportive and retains its shape.