BREATHABLE SUPPORT A lightweight mesh upper offers excellent ventilation and durable support on every run. Rubber pods on the outsole for traction and durability Flywire cables and mesh lining provide a snug, adaptive fit 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. The team spent eight years studying the biomechanics of runners' feet in motion. 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.