You'll Love that Valve! The secret to the extraordinary comfort of this cushion is the valve. It lets you customize the seat to your specific comfort level. ROHO Shape Fitting Technology makes the difference. The LTV Seat Cushion is made of individual, interconnected air cells that allow air to slowly transfer from chamber to chamber and evenly distribute body weight pressure. Weighing only one 1 pound, the LTV Seat Cushion is lightweight and easy to fold. It can easily be transported from your scooter, to the car or wherever you may need a cushion for use outside of a wheelchair. Construction Cushion AIR FLOATATION Overlay made of DEHP free polyvinylchloride Two cover options Black UltraLeather and Black Quilted Fabric. The Quilted Fabric option has a two-way stretch top that enables the cushion cells to conform to the individual's body shape. Encased foam is stitched into the cover for added comfort. The cover has a stretch 100% Polyester top material that is a durable heavyweight fabric, with a soft feel. The fluid proof, solid, non-skid base material offers a durable easy to clean surface. Complies with EN1021-1 and EN1021-2 flammability requirements. The top and sides material is now 100% Fire Retardant Polyester. The Black UltraLeather option is 50% polyurethane, 35% rayon, 15% nylon. The bottom material is 65% polyester / 35% rayon knit fabric with non-slip PVC coatingSpecifications Size 18 x 16 / 45.5 cm x 40.5 cm Weight Limit 275 lbs. / 125 kg Weight 1.25 lbs. 0.6 kg Includes Cover Hand Inflation Pump Patch Kit Owners ManualWarranty 12 Month Limited Warranty 1 Each / Each ***ROHO products can only be shipped within the United States of America***