DYNAMICALLY FLEXIBLE. NATURAL FIT.The Nike Free RN Flyknit Big Kids' Running Shoe gives you the unparalleled fit of Nike Flyknit—an ultralight material that wraps your foot from toe to heel, providing a dynamic, sock-like feel. A fully updated Nike Free midsole expands and contracts with your foot on every stride for an incredibly natural running experience.Dynamic MovementWith each stride, the updated Nike Free midsole's unique structure expands and contracts in all directions, following the natural motion of your foot.Plush CushioningAn ultra-soft foam midsole helps cushion impact while giving you a plush feel from the whistle to the finish line.Sock-Like FitA near-seamless Flyknit upper hugs your foot for a locked-in feel and lightweight, breathable support on every run.More DetailsRubber pods on the outsole for traction and durabilityFlywire cables provide a snug, adaptive fitAdded structure in the heel enhances lockdownNike 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.Flyknit OriginsNike Flyknit technology was inspired by feedback from runners seeking a shoe with the snug (and virtually unnoticed) fit of a sock. Nike embarked on a four-year mission with teams of programmers, engineers and designers to create the technology needed to make the knit upper with static properties for structure and durability. Then the precise placement of support, flexibility and breathability—all in one layer—was refined. The result is a featherweight, formfitting and virtually seamless upper.