The lightweight running shoe that will do it all, no matter the terrain– the Fast-Trac Nitro 2 has dropped. It delivers a smooth ride and ground-feel on surfaces including including loose trails and gravel, thanks to a full-length Nitro Infused top layer embedded in the ProFoamLite midsole. Add to that the durable Pumagrip-ATR outsole and integrated eyestays for a snug fit, along with details at the toe that help drain and protect from debris – and you're golden with this ground-breaking shoe made for all runners in all four seasons. Seasons Fast-Trac Nitro 2 Running Shoes