Whether working or driving, we spend a lot of our time sitting. Lower back support for your chair or car seat is important. This ergonomic memory foam seat cushion, with a cooling gel layer, provides comfort and lower back support while sitting for long periods. The u-shaped, cut-out in the rear of the cushion enhances comfort by reducing the pressure on the tailbone while sitting. Designed to promote a healthy posture by molding to the body, this coccyx cushion is ideal for use on office chairs, wheelchairs, and in the car or truck. This contoured seat cushion is designed with a cooling gel layer on 100% pure memory foam. This memory foam is the same material used for high-end mattresses. Memory foam is heat responsive; the firmness of the cushion will change with the temperature in the environment in which it is being used. Memory foam will be softer in warmer temperatures and firmer in cooler temperatures; room temperature is ideal. The unique properties of memory foam allow the cushion to return to its original shape after use. Created with premium features, this memory foam seat cushion is covered in a machine-washable soft velour fabric with a zipper for easy removal. Ready to travel, this memory foam seat cushion includes a built-in carry handle for easy transport. Bring this cushion to work for your office chair, and use it in the car for long trips, on wheelchairs, at sporting events for hard bleachers and benches, and even on an airplane. Thoughtfully designed with a rubber-texturized bottom to minimize movement as you sit, removing the worry of keeping your cushion in place. Overall Dimensions: Front to Back: 13.7"; Side to Side: 17.5"; Height: 2.8". Care Instructions: Cover: Unzipper to remove the cover from the cushion. Machine wash cover only on cold/gentle cycle with mild detergent. Tumble dry low or no heat. Cushion: Memory foam pillow can be spot cleaned with water and mild detergent.