Experience Built It, Style Defines It Built on Polaris expertise, the Polaris 3900 Sport delivers the most technologically advanced pool cleaner on the market. PosiDrive all-wheel drive system with 50% more torque. Most vacuum power of any 3-jet Polaris cleaner, with 40 GPM of additional pool filtration through the filter bag -5-liter capacity filter bag with easy twist-release connector. Durable plastics and stainless steel hardware. With a sleek and sporty new body design, the Polaris 3900 Sport re-defines Polaris performance for your pool.