ASICS’ unique and newly-shaped Biomorphic Fit technology allows the shoe’s upper to move naturally with the foot and offers the optimal individual fit. The Biomorphic Fit technology allows the upper to move in exactly the same way as the foot, thereby reducing the effect of material bunching that can cause discomfort and blistering. This leads to greater comfort during running, more rapid foot recovery and heightened performance. Advantages: - optimal individual fit - increased running comfort - reduced chance of friction