The H2X Challenger 19D has everything you could want from a swim spa. It has an outdoor 4 seater hot tub with comfortable ergonomic seats plus a huge swim zone. The Challenger 19D is all about a great swim experience, it begins with the 6 jet VIP system, it draws and drafts water from multiple points making for a stronger current coming out towards the swimmer. Plus, the Airless VIP jets produce pure water flow powered by 3 powerful pumps. Unlike most swim spas that inject air through the jets, a pure water flow system creates a powerful, stable and consistent swim stream with little to no turbulence.