NIKE Men's Free RN Distance 2 Running Shoe mesh Nested auxetic design on the outsole provides tuned flexibility. Partial woven upper delivers durability and lockdown. Free-floating mesh bootie offers a stable feel. Loosely woven fabric in the forefoot flex zone provides natural stretch. This provides optimal movement that is more breathable than the previous version. Dynamic Fit technology is achieved through Flywire cables integrated with the laces for an adaptive, supportive fit.