PACKAGE - 4 x Cushion; Size:about 47x37x15cm; Notice:Please make sure that when using these seats the water in your spa is chemically balanced. 4 CUPS CUSHIONS - Easily filled using standard hose nozzle or fill by in spa.Suction cups prevent seat from floating or moving. MULTIFUNCTIONAL INFLATABLE HOT TUB SEAT & WATER-FILLED SPA BOOSTER SEAT PAD - 1.The bottom water injection port can be inflated, also can be inflated and filled with water; 2.In areas where there is a custom of bathing in bathhouses, this inflatable cushion can effectively avoid hygienic isolation from public areas. The Inflatable cushion size about 47x37x15cm/18.5x14.57x5.91inch, easy to carrying and storage. NICE DESIGN - Heavy-Duty heat resistant material.Firmness and size can be adjusted by the amount of water used. Please note:Slight color difference or difference in kind, does not affect the use, please do not mind, thank you! WARM NOTICE: 1. Please make sure to keep the water balance when using these seats in