Heated Air Bubble Technology: Immerse yourself in heated air bubbles that relax your body, melt away stress, and leave you feeling rejuvenated. The heating system adjusts to fit your personal temperate preference, for an optimal spa experience. Energy-Efficient Spa Cover: Keep the water warmer, longer, with high-density thermal-resistant foam that locks in heat and minimizes loss. This energy-efficient hot tub cover boosts performance, improves efficiency by up to 50%, and lets you enjoy longer, more relaxing spa sessions. Fiber-Tech Beam Construction: The plush, supportive inflatable hot tub creates a luxurious escape, while advanced Fiber-Tech Technology delivers lasting strength and stability—so you can unwind with total peace of mind. Hard Water Treatment System: Bask in outdoor spa sessions with soft water thanks to the built-in Hard Water Treatment System. By reducing harsh mineral buildup, the treatment system extends the life of your backyard spa. Easy Access Filter Replacement: The portable spa is simple to maintain and features an integrated control box design for cartridge filter replacement. Includes two easy-to-replace S1 Type filter cartridges.