NIKE RIVAL D IV MENS TRACK SHOES Synthetic and mesh Imported Open mesh uppers breathable mesh uppers with forefoot overlays for support Spikes - 6 removable spikes for great traction on a variety of surfaces. EVA midsole - Thin EVA wedge for lightweight cushioning to keep your feet comfortable BRS 1000 rubber outsole - Durable carbon rubber and blown rubber outsole for traction, durability and cushioning where it is needed most Tie closure