Columbia has the fastest growing line of air cushions due to our innovative air cell pattern that maintains superior inflation and user comfort. Extensive pressure mapping was used in developing our unique Polyair® cushions to ensure balanced support, especially for patients with asymmetries and pelvic imbalances. In addition, each cushion comes with a pressure gauge that takes the guesswork out of ensuring the proper inflation. Columbia Polyair™ cushions are constructed of Laxprene which is 17 times more tear-resistant than the leading competition.