Hot Tub SeatsMassage Mat Soft Inflatable Booster Seat for Spas and Hot Tubs For Adults Kids Spa and Hot Tub Booster Seat Inflatable Bathtub Massage Cushion Soft Back Support Bath Spa Pad for Adults Elders Kids at Home Spa Rest. Inflatable AdjustableEasily filled using standard hose nozzle or fill by jets in spa; Firmness and size can be adjusted by the amount of water used. Size After filling: 47 x37 x 15cm, the hardness and size can be adjusted by the amount of water filled High quality Made of high-quality PVC material, soft and comfortable, heat-resistant and compressive, not easy to break and leak Widely UsedSuitable for all spas and hot tubs,comfortable and attractive for both adults and children, especially great to use in elders bath as a sort of booster seat.