Ameda Locking Ring, 1 Each Tub Lifts s shape in order to The unfolded towel measures s shape in order to minimize tissue deformation and facilitate blood flow * Made of flame resistant black neoprene (not made with natural rubber latex) with nickel plated brass inflation valve * Contoured foam base made of fluid resistant polyeth * Weight Limit: 500 lbs 225 kg * Warranty on cushion: 24 Month limited warranty * Warranty on cover: 6 Month limited warranty * Use for upper and lower body exercises * Comes with a fully automatic 5 function digital display Disk can be removed for nipple or left in place to cover bottle while traveling or storing