Transform your backyard with the H2X Trainer 21D, a dual-zone swim spa that seamlessly blends exercise and relaxation. This 21-foot swim spa has an expansive swim area, a hot tub section with massage seats, and the integrated sun lounge. With an adjustable water current, you can swim or exercise at your pace. On the hot tub side, say good-bye to tensions, aches, and daily stresses. Customize your experience with independent temperature controls, adjustable jets, and ambient LED lighting.