Air Foam Cushion 18 x 16 x 3 Exercise Physical Therapy * A muscle activation figure Jobst Relief 20 30 Knee Hi * A muscle activation figure that shows which areas are being targeted 5 height x 4 18 x 16 x 3 * A new concept in pressure adjustable wheelchair seating * Skil Care s innovative Air Foam Cushion combines variable air pressure capability and high density foam for optimal pressure redistribution seating stability and user comfort * Safety straps keep cushion in place * Air quilt surface inflates or deflates to meet user s pressure reduction requirements * High density foam base provides stability comfort and prevents bottoming out * Low Shear II outer cover protects agaisnt skin damaging friction and wipes clean * Incontinent proof vinyl inner cover prevents fluid contamination and wipes clean for easy care and infection control * New anti slip bottom for added user safety * All Air Foam Cushions include an easy to use air pump * Latex Free * Foam Base is 2 thick * Air cushion is ´ thick * Notice to California Consumers: WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm *