One piece mesh Upper - Reduces seams for breathability and comfort. * Seamless Overlay - Provide structured support without adding weight. * Internal Midfoot Arch Bandage - Helps lock down the foot for a snug, secure fit and optimal power transfer on the track. * Compression molded phylon Midsole - Delivers a smooth, responsive ride from heel to forefoot. * Moulded Medial Arch - Provides additional support in the midfoot for a variety of distance races.