Okwu Comfort Coccyx Orthopedic Pressure Relief Seat Cushion is a high density memory foam pillow. It helps to reduce pressure on the coccyx, tailbone and hipbones while sitting. This pillow is ergonomically designed and helps to distribute weight evenly which helps to decrease pressure. My husband loves to take this pillow to football games. He has had issues with his back and sitting in those hard, concrete stands can be uncomfortable and sometimes painful. This cushion is very comfortable. It helps to align his back and relieve any pain. He can sit comfortably for the entire game. These pillows have a velour cover that's machine washable. The pillow is soft yet firm and the cushion bounces back when he gets up. It's a heavy duty cushion that my husband can't leave home without. Highly recommend. I received this cushion in return for my unbiased review. You can find out more about Okwu Comfort Coccyx Orthopedic Pressure Relief Seat Cushion @ http://www.okwucomfort.com.