LIGHTWEIGHT FLEXIBILITY. MIDFOOT LOCKDOWN. Be in your element with the flexibility of the Men's Nike Flex Train Aver Training Shoe. With its breathable, open-hole mesh upper and Flywire cables that support rigorous cuts, the shoe is built to help you train in a barely-there fit and feel that offers the support you need.Nylon Flywire cables offer stability during movement. Open-hole mesh creates an ultra-breathable feel. Triangular nodes are hot-knifed into the outsole. Box lid is slightly torn