NIKE Womens Flex Experience RN 4 Premium Running Shoe#749177-400 (9) Breathable, single-layer mesh upper with no-sew overlays for a lightweight, supportive fit. Soft IU midsole for flexible cushioning. 8mm heel-toe offset encourages a natural stride. Minimal Green Rubber outsole with pods in high-wear areas for durability where you need it most. Wt. 7.6 oz.