Comfortable memory foam chair cushion: The chair cushion is made of high quality, high density memory foam with good elasticity, so you don't have to worry about the cushion deforming easily. The surface of the pillow is covered with a layer of gel, which offers good comfort and does not clog easily.Ergonomically shaped orthopedic seat cushion: This seat cushion has a U-shape that conforms to the legs and hips and is shaped to provide adequate support and comfort while promoting a healthy posture and reducing fatigue caused by prolonged sitting.Relief from Lower Back Pain and Sciatica: The coccyx cushion is orthopedic to the back and the stone leg and relieves the pressure on the stone leg. Helps with sciatica, spinal cord injuries, and pain caused by long periods of sitting.Durable and Easy to Clean: The velor cover of this ergonomic seat cushion is very soft and has a zipper for easy changing and cleaning.Versatile application: Memory foam seat cushion is 45357cm in size and has a non-slip base so that it can be used on a wide variety of chairs. It is not only suitable for use in the office, in the car and in a wheelchair, but can also be used on the go to relieve back pain caused by long periods of sitting. A great gift for people with stony leg problems.