Model [ NK11400768]Nike Free RN Motion Flyknit 2017 Running Shoes Black/Pure Platinum/Wolf Grey/WhiteNatural Flexibility. Adaptive Fit.The Nike Free RN Motion Flyknit 2017 Men's Running Shoe features an incredibly flexible sole that lets you move naturally and a revolutionary two-strap system for snug, lace-free comfort. Seamless ComfortNike Flyknit fabric wraps your ankle and foot for a snug yet stretchy feel. A two-strap system lets you customize the fit and eliminates any pressure from traditional laces. Lightweight CushioningSoft and firm foam combine for lightweight cushioning that promotes a smooth ride. Complete Flexibility: The lightweight, low-profile Nike Free sole flexes with your foot for a comfortable, natural ride. Product DetailsAnatomical rounded heel enables natural movement. Weight: 8.25 ounces (men's size 10). Offset: 4mm Flyknit 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, 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 four 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.