Speed and control in one intelligent system. The patented BowTech kinetic technology uses dual plates to store energy during impact and forefoot load, releasing it explosively at push-off, driving you forward while guiding every stride along a centered, controlled forward momentum. Together with Supercritical N+Foam, Optaspeed delivers a new running experience. Explosive propulsion and guided stability, improving your running form, focusing your energy, and leveraging the natural mechanics of the foot. EVA in the heel cushions impact for lasting comfort.