The ultimate wedge seat cushion that alleviates pressure on pelvic, coccyx, tailbone, legs and hipbones while sitting at work or driving. High density contoured memory foam that molds to your personal posture and troubled areas. Offering precise firmness for comfort, durability, and a therapeutic experience. Ultra comfortable and durable memory foam Reduces pressure on the tailbone and hips Designed to fit all seat: car, truck, desk chair, wheelchair and more Non-slip grip bottom Removable, machine washable cover Dimensions: 13.8 inches x 15.8 inches x 3.2 inches