Women’s Nike Flex Experience RN 5 Running Shoe Updated with an allnew upper, Women’s Nike Flex Experience RN 5 Running Shoe delivers a socklike fit through its breathable mesh fabric and minimal seamless overlays. Upper pattern has been streamlined for a socklike fit. Singlelayer mesh for optimal ventilation in the forefoot. 7.2mm offset and rounded heel promote a natural range of motion. Injected unit (IU) sole provides lightweight cushioning.