The Nike Free Flyknit NSW Black/Radiant Emerald/Vivid Purple/Green Glow of Men's Nike Running Shoe combines a seamless knit upper with deep flex grooves for a lightweight, supportive fit and barefoot-like flexibility.ULTRALIGHT SUPPORT. FLEXIBLE COMFORT.Virtually seamless, formfitting Flyknit upper for ultra-lightweight supportFlywire cables for lightweight support and an adaptive fitPhylon midsole for lightweight cushioningOutsole flex grooves for more natural flexibility and better range of motionStrategically placed rubber lugs for durabilityFlyknit OriginsNike Flyknit technology was inspired by feedback from runners seeking a shoe with the snug (and virtually unnoticed) fit of a sock. Nike embarked on a four-year mission with teams of programmers, engineers and designers to create the technology needed to make the knit upper with static properties for structure and durability. Then the precise placement of support, flexibility and breathability—all in one layer—was refined. The result is a featherweight, formfitting and virtually seamless upper.Nike Free OriginsAfter 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....The Nike Shoes more colors