Stable and speedy, with ultimate traction on the road and a sock-like fit, the Fastwitch is a great race day shoe. Equipped with PowerTrac outsole rubber, the Fastwitch has three times the traction compared to normal rubber, and a more responsive midsole.OVERVIEW? First shoe from Saucony to use our brand new PowerTrac outsole rubber? More responsive midsoleSPECS? Surface: Road, Track, Cross Country? Offset: 4mm? Heel Stack Height: 18mm? Forefoot Stack Height: 14mm? Weight: 6.4oz | 183g