Aeris Memory Foam Seat Cushion - Best High-density Visco Elastic Car Pillow with Machine Washable Plush Velour Cover - Auto Seat Pad - Chair Pad Ideal for Car Seats, Office, Kitchen, Computer Seats, Sofa and Any Other Chairs - Lifetime Free Replacement Guarantee. Seat cushion conforms to hip and leg curves, while the "U"-shaped design of the back reduces pressure on the coccyx while sitting. It can disperse pressure evenly, and relieve muscle fatigue, providing superior comfort for chairs, car seats, planes, and wheelchairs. Avoids flat buttocks due to sedentary behavior, prevents waist pain, eliminates discomfort caused by hemorrhoids Made of the highest quality foam material available. 80% cotton, 20% polyester machine washable plush velour cover.