Nike Women's Free 5.0 Runner/Trainer

The Nike Free 5.0 combines flexibility, comfort, traction, and support. They feature a lightweight and breathable no-sew upper, Flywire technology, an 8mm difference between heel and forefoot height for exceptional cushioning, and a Free outsole with hexagonal flex grooves that allow movement in every direction. MORE BENEFITS No-sew overlays for support and durability without the added weight Traditional tongue construction to cushion lace pressure Minimal sock-liner molds to your foot's curvature for added support and comfort Waffle outsole lugs help absorb impact and add responsiveness Weight: 7.2 ounces 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. * Since Nike Free's introduction, millions of runners have trained in the shoe, including some of Kenya's world-class runners.