Next Best Thing to Bare The ideal, barely-there shoe for shorter-distant runs, the Nike Free RN Flyknit 2018 delivers a natural, flexible feel, and important support. The ultra-light, one-piece Flyknit upper incorporates zones of support, breathability, and stretch. Dynamic Flywire cables integrated with the lacing system provide a secure fit, while stretchy Dynamic Heel Fit construction adds ankle and heel support. Better Fit and Feel Updates to the 2018 model make this the lightest and most comfortable option in the Free RN line. The sock-like upper contains more stretch yarns than previous designs for improved feel. Spandex has been added to the laces to facilitate more secure lockdown and the soft sole expands and contracts with your foot. In fact, this shoe is so flexible it easily collapses for convenient storage in your backpack or bag. One-piece mesh upper is highly breathable. Open weave in midfoot allows cooling airflow. Spandex laces and flywire cables combine for secure lockdown. Midsole with soft Phylon foam core provides lightweight cushioning. Tri-star outsole pattern ensures a natural, flexible feel. Solid rubber sections protect high-wear areas under heel and toe.