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FLEXIBLE AND DYNAMIC
The Nike Free Train Force Flyknit Men's Training Shoe is as dynamic as your workout, combining the second-skin fit of Nike Flyknit with a revolutionary Nike Free outsole that expands and contracts with your foot on every landing.
A Flyknit upper hugs your foot for a locked-in feel and lightweight, breathable support that moves with you during your workout.
The shoe's unique dual-density midsole provides the cushioning you need for varied cardio workouts along with the stability required for lifting.
With each stride, the updated Nike Free outsole's unique tri-star structure expands and contracts in all directions, following the natural motion of your foot.
Nike Free Origins
After learning that Stanford athletes had been training barefoot on the university's golf course, 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 eight 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.