SUPER NATURAL FLEXIBILITY The lightweight Nike Free Inneva Woven SP Women's Shoe is made with an intricate, 360-degree woven textile that interconnects with the laces to wrap around your foot for a glove-like fit. The already legendary Nike Free midsole and outsole offers top-notch flexibility, cushioning and comfort. Benefits Nike Free construction for more natural movement and an extraordinary feel Woven textile upper for durability and versatile style Glove-like, custom fit that adapts to a variety of arches Strategically placed carbon rubber on the outsole for enhanced durability Rubber Waffle outsole for traction Nike Free Origins After 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, 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 foot's natural landing angle, pressure and toe position, allowing Nike designers to build an unconventional and flexible running shoe from the inside out.