Marquis' new Vector21 hot tubs deliver a flow and force unlike any seen before in hot tubs: control and versatility unequaled in any other advanced system concept with individual command and control. Vector-Optimized Laminar Therapy (V-O-L-T) System is a powerful performance feature within the hydrotherapy design of every Jetpod. In laminar flow there are no cross-currents or swirls of water. This delivers maximized flow volumes and significant hydrotherapy benefits.