Roho Contour Select air cushion 19.50"x20.25"x4.25". #CS1011C. Designed for positioning and posture, the CONTOUR SELECT keeps you centered in the middle of the cushion, with your pelvis back in the wheelchair. It comes with the same clinically advanced features and technology as the QUADTRO SELECT, but has multiple cell heights. These varying heights help guide your thighs into the leg channeling paths, and keep you in an upright posture. With the exclusive ISOFLO Memory Control you can lock air into the four separate compartments, providing the stability and positioning you need, and minimizing side-to-side and front-to-back motion.