Model [ NK11398439]Nike Free RN Commuter 2017 Running Shoes Cool Grey/Wolf GreyVersatile, All-Day Comfort.The Nike Free RN Commuter 2017 Men's Running Shoe provides all-day comfort and flexibility for your run and the rest of your day. Durable ComfortStretch-knit fabric provides durable, lightweight support while an elastic strap wraps your heel and midfoot for a snug and secure fit. Secure LockdownNike Flywire technology - strong, lightweight cables that wrap around your arch to the top of your foot - provide a secure, locked-down fit. Move NaturallyThe Nike Free sole is designed to expand and contract with every step for a natural feel underfoot. More DetailsInner sleeve wraps your foot for added comfort. Weight: 9.15 ounces (men's size 10). Offset: 8mm 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.