What makes the 16Ex stand out is the extra room for the most dynamic cross-training program on the market. You’ll always be ready for what’s new and challenging in aquatic fitness. To swim, the current easily adjusts for every level, from toddlers to triathletes. Just adjust the Aquapro control to swim in place easily. For aquatic exercise, let the swim current add resistance and build core engagement. The built-in Underwater Treadmill allows you to walk, jog or run in water’s low-impact environment. With none of the pounding of dry-land activity, you’ll burn just as many calories, plus benefit from 360-degree resistance! the durable, steel-framed cabinet has sleek, modern styling; combined with the patented self-cleaning† technology, it is a swim spa that’s virtually maintenance-free.