Model [ NK11390601]Nike Free RN Distance 2 (Boston) Running Shoes Black/Yellow Strike/WhiteTuned Flexibility, Natural Support.The Nike Free RN Distance 2 (Boston) Men's Running Shoe lets your foot move naturally with an ultra-flexible outsole that provides just enough support and cushioning to help you cover any distance. Natural FlexibilityThe Nike Free outsole expands and contracts to allow your foot to move naturally from heel-strike to toe-off. Breathable ComfortBreathable fabric in the forefoot and internal sleeve helps keep your feet cool and comfortable. Supportive FitFlywire technology-strong, lightweight cables that provide support-bring a secure, locked-in fit through your midfoot. More BenefitsDynamic Fit technology provides a secure, adaptive fit. Soft, responsive Lunarlon cushioning helps absorb impact. Loosely woven fabric in the forefoot for natural stretch. Weight: 8.8 ounces (men's size 10). Offset: 4mm 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.