The Nike Free 5.0 Women's Running Shoe is made with breathable mesh and deep Nike Free sips for a smooth, comfortable ride and maximum flexibility. Light weight mesh with dynamic quarter creates a snug, flexible fit that moves with the natural motion of the foot. Injected Phylon midsole for lightweight cushioning. Deep Nike Free sips for excellent range of motion and a natural, barefoot-like feel. Nike Free After learning that Stanford athletes had been training barefoot on the university's golf course, three of Nikes most innovative and creative employees set out to develop a shoe that felt natural and weightless, similar to 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 foots natural landing angle, pressure and toe position, allowing Nike designers to build an unconventional and flexible running shoe from the inside out.