NATURAL COMFORT The Nike Free RN 2017 Little Kids' Running Shoe combines a lightweight, breathable upper with the cushioning and flexibility of a Nike Free sole. Benefits Mesh upper with overlays for supportive comfort Hook-and-loop strap offers a locked-in feel Nike Free sole for lightweight, flexible cushioning Rubber outsole sections in heel and toe for durable traction Tri-star flex grooves allow natural motion in all directions Nike Free Origins After 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. Style: 904259; Color: Black/Dark Grey/Cool Grey/Anthracite; Size: 2Y; Gender: Kids Unisex [running shoes, shoes for running, runner footwear, jogging shoes, running sneakers]