The Grid Virtue utilizes Fit-Trax, a multipurpose outsole design inspired by circuit training workouts. The breathable upper keeps you cool. The medial arch support and HRC Strobel Board increases cushioning and step-in comfort. The non-visibal grid system offers stable cushioning to the heel. The shoe also features a heel propel crash pad. The XT-900 carbon rubber outsole provides exceptional traction and grip for off road conditions.