Uses the latest technology available for pressure relief and skin protection. Ultra high density molded foam provides superior protection from bottoming out. The cushion also available with a four chamber gel pack that allow for even distribution of gel under the ischials and seated area. Anti-microbial fluid-proof vinyl cover allows for easy cleaning, Kwik strap attaches around wheelchair to keep cushion stationary during user transfers. 4" thick. 650 lb. weight capacity.