Description:Nike Free RN Breathable, Flexible, Fast.The Nike Free RN Big Kids' Running Shoe lets you run naturally and comfortably thanks to a Nike Free sole that flexes with your foot on every stride. Dynamic MovementThe revolutionary Nike Free sole features a tri-star pattern that expands and contracts in every direction, following the natural motion of your foot. Plush CushioningUltra-soft foam cushioning helps to absorb impact while giving you a plush feel from the whistle to the finish line. Breathable SupportA lightweight knit material offers excellent ventilation and durable support on every run. More DetailsNo-sew overlays add durability at the heel. Rubber sections at the toe and heel of the sole add traction and durability Nike Free OriginsAfter 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.products_model:904255-002Nike Free RN 2017 Kids Running Shoes Black/Dark Grey/Anthracite/White (Big Kids)