The minimal design of the Nike Flex Run 2015 Men's Running Shoe wraps your foot in maximum comfort. From the breathable upper to the Nike Flex platform in the outsole, you get the best of both worlds with instinctive movement and soft cushioning. Asymmetrical upper design for targeted ventilation and support. Breathe Tech construction on the lateral side upper fuses foam and mesh. Synthetic leather wraps the medial side upper for a secure fit. Lightweight Phylon foam in the midsole is pressure mapped for a comfortable ride. Phylite midsole is durable enough to double as an outsole. Articulated two-piece Nike Flex outsole features soft Phylon cushioning.