"Tush Cush" is CMPT's favorite seat / car wedge cushion! Although they are pricey, we find they are more durable than those made by other brands. A seat wedge is designed to lift the hips up to decrease the angle at the hips. This can help to decrease hip impingement, lower back pain, sit bone pain, and improve posture. The wedge shape slants from the back 3" down to 1/2" in the front. Click here to be directed to a site where this can be purchased.