Feature: 1. SECURE SPA EXPERIENCE: This inflatable hot tub seat features a suction cup bottom that prevents floating or shifting, allowing you to create a truly relaxing spa experience in your hot tub 2. ADJUSTABLE FIRMNESS: The spa mat can be filled with gas or water, enabling you to adjust the firmness according to your comfort preference by varying the water and gas levels 3. DUAL FUNCTIONALITY: This cushion offers dual functionality with a water inlet for filling and an valve; it can be inflated and filled with water, providing you upgraded stability and support 4. ENHANCED SLIP RESISTANT: Featuring upgraded suction cups with mesh slots, this version is more non slip, preventing the auxiliary seat from lifting or shifting during use in your hot tub 5. VERSATILE USAGE: Suitable for home bathtubs, outdoor tubs, spa centers, pools, and wellness centers, this inflatable hot tub seat is the great accessory to enhance your relaxation experience Specification: Item Type: Hot Tub Booster Seat Material: PVC Size: Approx. 47 x 37 x 15cm / 18.5 x 14.6 x 5.9in (manual measurement with 1-3cm error) Use: Suitable for home bathtubs, outdoor bathtubs, spas, swimming pools and spas.. Package List: 1 x Hot Tub Booster Seat 1 x Repair Patch