Next time you hit the ground running, lace up in these women's Free RN trainers from Nike. Absolute extra mile must-haves, the mesh upper keeps you cool, with Flywire cables for a locked down, super-responsive performance. Sat on an ultra-flexible Free midsole that expands and contracts with every step, so your running stays smooth and fluid whether it's 3 miles or 30.. Material: Textile Upper/Synthetic Sole