The Nike Free TR Fit 2 training shoe was designed for the female athlete looking to improve lower body strength and flexibility while training for her sport. Engineered foam construction. Asymmetrical internal structural support system offers multidirectional movement. Stretch heel counter adds ankle mobility. Phylite midsole with linear and lateral flex grooves provides ultimate multidirectional flexibility and natural motion. Rubber outsole with heel and forefoot rubber pods gives multidirectional traction and control on all surfaces. Wt. 4.8 oz.