NIKE Men's Metcon 2 100% Mesh Synthetic sole Shaft measures approximately 2.5" from arch On-Demand Support. Super-strong Flywire cables combine with the laces to lock down your foot. Lightweight Cushioning. Foam cushioning offers lightweight comfort as you lift, jump, climb and run. Stable Platform. The shoe's flat heel helps you feel stable and connected to the ground during explosive lifts. Mesh upper offers breathable support Solid rubber sole provides excellent traction