There's nothing like a soothing, warm soak surrounded by thousands of therapeutic bubbles after a long day. Incorporating 140 heated bubble jets with Intex's unique patented Fiber-Tech™ construction the PureSa™ Bubble Therapy is like no other inflatable spa in the world today. The easy-to-use control panel activates the high performance bubble jets surrounding the interior of the spa for a refreshing massage. The heating system adjusts to fit your personal temperature preference allowing a stress-free spa experience. PureSpa™ provides simple maintenance with easy-to-replace filter cartridges for lasting enjoyment for up to 4 people. Now with a built-in Hard Water Treatment System making water gentler on skin, clothes and the entire Spa system.