Electrifying speed and acceleration. This hypersonic shoe is an uncompromising minimalist racing flat that promotes the most efficient, natural running style. The 1 Arrow Shoc-Zone gives maximum cushioning and as such, this shoe has been designed for elite runners, those with a refined natural running style and runners wanting to experience a minimalist shoe. As such, the 222 is the only road-x that does not feature the Dynamic Fascia Band technology and instead relies on the strength of the athletes foot. The narrower, Performance Fit means this shoe provides a great fit to both men and women.