4 Suction Cups：Easy to fill using a standard hose nozzle or fill by jets in the spa. The suction cups prevent the seat from floating or moving. Adjustable Design: Heat-resistant material. The firmness and size can be adjusted according to the amount of water used. Package Content: 2 x Cushions; Size: Approx. 47 x 37 x 15 cm. Note: Please make sure that when using these seats, your spa water is chemically balanced. High Comfort : Comfortable and attractive, it is the perfect choice for enjoying the spa. Note: Please make sure that when using these seats, your spa water is chemically balanced. If the balance is out of balance, the product may not stick to the surface.