Model [ NK11394606]Nike Free Train Virtue Training Shoes Black/Dark Grey/Pure Platinum/WhiteStreamlined Fit. Total Control.The Nike Free Train Virtue Men's Training Shoe locks down your foot during your workout with multiple stretch bands, while the Nike Free sole allows movement in all directions. BenefitsNike Free sole allows flexibility in all directions. Dynamic stretch bands, Flywire cables help provide lightweight stability. Stretch collar provides a seamless fit and easy entry. Textile material integrates with bands for a secure fit. Lightweight dual-density foam offers plush cushioning. Rubber sections at heel and forefoot for durable traction 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.