Go light on weight and heavy on tech, just like we did with the Endorphin Racer 2. Our lightest road racer features a single layer mesh upper for breathability, FLEXFILM overlays for lightweight support, and a new EVERUN forefoot midsole to handle all your newfound speed. OVERVIEW ? Successor to the Endorphin Racer ? FLEXFILM upper is lightweight and supportive ? Single layer mesh cuts down on weight, while boosting breathability ? EVERUN forefoot midsole provides more energy return with every step ? SSL EVA molded heel midsole for lightweight support ? PWRTRAC Rubber outsole provides 3x better traction than standard rubber SPECS ? Surface: Road, Track ? Offset: 0mm ? Heel Stack Height: 10mm ? Forefoot Stack Height: 10mm ? Weight: 4.0 oz. | 115 g.