Made of high quality heat resistant material,comfortable and attractive for both adults and children. The Thick foam cushioning great for relaxing after a long day. Heat resistant material for heavy duty. The resistance and the dimensions can be adjusted according to the quantity of water used. Suitable 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. Only in the smooth and flat place can exhaust air to form a vacuum adsorption on the top, or is not able to be adhesive.