Comfortable Gel Memory Foam Cushion – Season Guard's all-in-one features are unrivaled: non-slip rubber bottom, built-in handle for easy transport, and machine-washable zippered mesh/velour cover for easy cleaning. The Coccyx Cushion is made of premium quality durable memory foam with a cool-off gel layer on top for superior comfort. Season Guard has a high-quality gel memory foam seat cushion with unique acupoint gel pads to reduce the pain of Sciatica and coccyx. Ergonomics designs for work, home, travel, cars, and trucks. Product size 17.7"LX13.7" WX2.8" H. Available in a vibrant array of colors! Whether you prefer classic black or gray or want to add a pop of personality with pink, purple, or blue, it perfectly matches your style.