【4 Suction Cups】Easy to fill using a standard hose nozzle or using jets in a spa. The suction cups prevent the seat from floating or moving. 【Adjustable Design】Heat-resistant, sturdy material. The firmness and size can be adjusted according to the amount of water used. 【Package Includes】1/2/4 * Cushion; Size: about 47 x 37 x 15 cm. Note: Please make sure that when you use these seats, your spa water is chemically balanced. 【High Comfort】 Comfortable and attractive, it is the perfect choice for you to enjoy your spa time. 【Note】Please make sure that when you use these seats, your spa water is chemically balanced. If the balance is unbalanced, the product may not adhere to the surface.