Recommended for: Competitive, medium to long distance trail running. This highly technical model is designed to meet the needs of elite trail runners who need a lightweight, cushioned, and responsive shoe for long runs and ultras. It's built with breathable yet supportive mesh uppers to hold the foot on tricky terrain, a cushioned TPE midsole and a carbon-reinforced split shank to return energy with every step, a one-piece collar and asymmetrical tongue to reduce friction points, and a roomy toebox for long-distance comfort.