The flex groove outsole—made up of deep cuts along the length and width of the midsole—enhances natural range of motion, encourages a smooth, efficient stride and helps maintain stability.
A low-profile midsole delivers a natural barefoot-like feel.It features the highest offset offered by Nike Free running shoes, with an 8mm difference between heel and forefoot height for greater cushioning while still promoting a natural stride. Plus, the Phylite material in the midsole is tough enough to double as an outsole, dramatically reducing the shoe's overall weight.
The Nike Free 5.0+ is the most supportive of the Nike Free family thanks to ultra-light Flywire technology.This updated version of Flywire consists of soft yet durable cables that wrap the midfoot and arch from underneath the foot for a glove-like, supportive fit that adapts to your stride.
After learning that Stanford athletes had been training barefoot on the university’s 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 , 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.