Electrifying speed and acceleration. This hypersonic shoes is an uncompromising minimalist racing flat that promotes an efficient, natural running style. With its unique injection moulded Fusion Sole and a 1 Arrow Shoc-Zone the 155 gives incredible proprioceptive feedback, minimum cushioning and an addictively relaxed, natural foot position. Accordingly, this shoe has been designed for elite runners and those with a refined natural running style. The 155 is the only ROAD-X shoes that does not feature the Dynamic Fascia Band technology and instead relies on the strength of the athletes foot. With a narrower fit this shoe is suitable for both men and women. Because the 155"s are an ultimate lightweight performance products anticipated durability is limited to 300 miles.