The Coleman Double High Air Mattress comes with the exclusive airtight feature that is guaranteed not to leak. This twin-sized mattress includes the ComfortSmart coil system, which contours to your body and the quilted-air system, which gives you firm back and body support. The double-lock valve has two sealing points guaranteeing a leak-free valve. This mattress is 17-inches high when inflated and the comfortable soft-suede top provides added luxury. Coleman Airtight System guaranteed not to leak Advanced Double Lock Valve locks in air two ways Electric Pump.