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. Insulated Spa Cover: Keep the water warmer, longer, with the insulated ground cloth and insulated spa cover, letting you enjoy longer, more relaxing spa sessions. Horizontal Beam & Mesh Construction: The horizontal beam construction delivers lasting sturdiness, while the strong mesh exterior resists punctures and abrasions—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. The portable Intex SimpleSpa provides relaxation at touch of a button. The easy-to-use control panel activates the high-performing bubble Jets surrounding the interior of the spa for a refreshing massage. The heating system adjusts to fit your personal temperate preference, allowing a stress-free spa experience. The portable Intex SimpleSpa Bubble Massage Spa provides simple maintenance with easy-to-replace filter cartridges for lasting enjoyment for up to 4 people.