Built with a rugged, all terrain outsole, superior cushioning, and a syntheticmesh upper that promotes airflow, the lightweight New Balance 610v4 is made for the trail. 12 mm heel to toe drop. Injection molded EVA foam midsole for firm yet flexible cushioning. No sew material application for comfort and light weight. Synthetic and mesh upper for support and breathability. Rugged AT Tread: dual use rubber outsole tread combines both trail and running lug designs for on and off road. Standard heel width, forefoot width, instep height, and toe box height.