FOREVER COMFY™ CUSHION delivers maximum comfort and support! Amazingly cushy seat cushion is made with a gel core surrounded by two layers of high-density foam. It conforms to your shape and evenly distributes weight to take pressure off bones, joints and muscles. Helps you maintain proper seating posture, too. Zippered polyester fabric cover with plush fleece top removes to wash. Great for home, office or car. 18-1/2" L x 14" W x 3-1/2" H.