Good Material: Our spa pad is made of premium PVC material. soft and comfortable, heat-resistant and compressive, not easy to break and leak.It can meet your different needs. Dual-Purpose Design: Use the water filling port at the bottom to inflate or fill water. It is suitable for spa use after inflating. If filled water, it will become a distinctive water-filled chair cushion. Easy to us: Just use a standard hose nozzle to easily fill or fill through the nozzle in the spa, easy to fill and remove, and reusable; Firmness and size can be adjusted by the amount of water used Thoughtful Design: In public areas such as bathhouses and spas, it will be more comfortable and cleaner to use your own inflatable chair cushions, bringing you a good using experience. Usage Tips: When using these inflatable seats in a spa, please make sure it is practical on a smooth surface, otherwise it will not stick to the surface stably; for air to release and forming a vacuum adsorption.