A lightweight running shoe that will do the trick, no matter what the terrain, the Fast-Trac NITRO. They're suitable for any terrain, including loose or gravelly trails, thanks to an intermediate outsole made of two types of foam: the full-length NITRO foam and a layer of ProFoamLite, as well as the durable PUMAGRIP ATR outsole. The integrated overlocks ensure a snug fit, while the elements on the toe provide drainage and protection against dirt.