Inflatable Spa Seat Massage Mat Soft Booster Seat for Spas and Hot Tubs for Adults and Kids. This inflatable bathtub massage cushion provides soft back support and is ideal for relaxing in home spas. Adjustable Inflatable Design: Easily filled with a standard hose nozzle or by jets in the spa; firmness and size can be modified by the amount of water used. Size after filling: 47 x 37 x 15 cm. High Quality: Made from durable PVC material, it is soft, comfortable, heat-resistant, and resistant to wear and tear, ensuring it won't easily break or leak. Versatile Use: Suitable for all types of spas and hot tubs, this seat offers comfort and appeal for both adults and children, making it particularly beneficial for elderly users as a booster seat.