There's fast, and then there's UA Flow fast. Lightweight, rubberless, and durable, our newest cushioning gives a close-to-the-ground, grippy feeling of speed as you train to go all out. Comfortable flat knit upper delivers zonal dynamic stretch, containment & breathability where you need it Reinforced heel construction with added foam for enhanced lockdown & security at heel strike Winged tongue adds midfoot hold & containment with added foam to eliminate pressure on top of the foot EVA sockliner adds extra bounce & resiliency with every stride Softer, lighter one-piece Flow midsole provides responsive & long-lasting cushioning Flow technology eliminates the rubber outsole, creating a more lightweight & seamless ride on any surface Outsole pattern is super-durable & grippy for a smooth, natural footstrike