Temperature sensitive visco elastic foam . Can be used for Lumbar or as a cervical cushion. For car or chair, This cushion supports and relieves pressure on the lower back and neck areas. Adjustable straps hold the cushion securely in place. The visco elastic foam conforms to the body's contours through the transfer of body heat. It can be used in a chair or car seat. It comes in black only. Helps relieve stress on the neck while working at the computer Dimension - 17 x 14 x 4 in. Item Weight - 5 lbs.