Nike Flex Run Women's Size 8 Gray Pink Running Athletic Shoes 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 comfortable ride. Phylite midsole is durable enough to double as an outsole. Articulated 2-piece Nike Flex outsole features soft Phylon cushioning. Please note that there is a small rust color spot on the toe of one shoe as well as a white spot on the inner part of the other shoe. see photos for details.