Roho's Nexus Spirit Cushion is positioned to address critical pressure points, providing user the highest level of skin protection to the ischia, sacrum and coccyx areas. Wheelchair cushion creates an adjustable, low-friction/low shear environment the protects user against wounds. It is easy to clean with soap and water, and the cover is machine washable. It is made of a flame resistant neoprene rubber support pad and flame-resist, polyurethane seating foam. One of the best wheelchair accessories.