The Nike Free 3. 0 v3: Barefoot-like freedom, shoe-like supportThe Nike Free 3. 0 v3 Women's Running Shoe offers the best of both worlds: the benefits and feel of barefoot running, along with excellent support and cushioning. BenefitsSeamless mesh upper for a lightweight, breathable fitPhylite midsole for durability, a resilient ride and reduced overall weightDeep Nike Free flex grooves for enhanced flexibility and stabilityWeight: 6. 2 oz (women's size 8)FitMinimalist by design, the Nike Free 3. 0 v3 features a seamless upper that's as flexible as it is breathable. Open mesh allows air to flow, while bonded lightweight overlays help lock the foot in place without restricting natural movement. The inner sleeve adds a plush feel, while off-center lacing reduces irritation that can be caused by chafing. FlexibilityThis version of the Nike Free has wider flex grooves across the forefoot for muscle activation, providing ample protection and just enough support for serious comfort. On Nike's barefoot scale, the 3. 0 most closely mimics the barefoot experience. OriginsAfter learning that Stanford athletes had been training barefoot on the university's golf course, three of Nike's most innovative and creative employees set out to develop a shoe that felt natural and weightless, just like bare feet. In 2002, they examined a group of men and women with pressure-measuring insoles taped to their feet, using high-speed cameras to capture images of each foot in motion. The team spent eight years studying the biomechanics of shoeless running. The results yielded a profound understanding of the foot's natural landing angle, pressure and toe position, allowing Nike designers to build an unconventional and flexible running shoe from the inside out. Additional DetailsStrategically placed overlays for supportDurable rubber outsole with Waffle pattern for traction