The Fastwitch is the perfect race day shoe! This racing shoe is the first in the range to use our brand new outsole rubber, PWRTRAC. This features offers three times the traction compared to normal rubber with a more responsive midsole. OVERVIEW ? Upper: FLEXFILM ? Midsole: SSL EVA ? Outsole: PWRTRAC SPECS ? Surface: Road, Track, Cross Country ? Offset: 4mm ? Heel Stack Height: 18mm ? Forefoot Stack Height: 14mm ?Weight: 5.8 oz. | 164 g.