[High Quality] Made of high quality PVC material, soft and comfortable, heat and compression resistant, not easy to break and leak[No slippage] There are 4 fixed suction cups at the bottom, to prevent the seat from floating or moving, please fix it completely before use[Easy to use] Simply use a standard hose nozzle to easily fill or fill through the spa nozzle, easy to fill and remove, and reusable[Size] After filling: 47 x37 x 15 cm, the hardness and size can be adjusted according to the amount of water filled, load bearing: 150 KG[Applicable] Suitable for all spas and hot tubs, especially suitable for use as a booster seat when taking a bath. Please ensure that the hot spring water is chemically balanced before use