NIKE Mens Air Max BW Premium Running Shoes synthetic-and-mesh Shaft measures approximately Low-Top" from arch Mesh and suede upper with no-sew overlays for a modern look and lightweight breathability Injected unit midsole doubles as an outsole to reduce the overall weight of the shoe Max Air heel unit delivers maximum lightweight cushioning Rubber Waffle outsole for durable multi-surface traction Forefoot flex groove provides a natural ride