The Challenger 18 D features an uninhibited swim area and increased depth for buoyancy. With an airless jet system, this swim spa is ideal for endurance athletes, fitness enthusiasts, and wellness seekers. The variable speed current lets you set the pace, whether you want a challenging workout or recovery session. After a workout, you’ll enjoy the relaxation and rejuvenation of the Xtreme Therapy Cove and contoured seats with massaging jets.