Nike flex 2017 rn mens running shoes the mens nike flex 2017 rn running shoes have a super lightweight feel with a flexible outsole that makes them perfect for the next time you hit the track benefitting from a dual density foam midsole and outsole that gives a super comfortable ride while the rubber pods at the heel and toe provide durable traction these nike trainers have also been designed with flywire technology that locks your foot down into the shoe coupled with the mesh panels across t