NIKE Mens Free TR2 Mens Running Shoes [442031-418] Obsidian/White-Team Orange Mens Shoes 442031-418 Mesh and synthetic leather upper for breathability, support and durability. Full-length foam midsole/outsole for lightweight cushioning and comfort. Deep flex grooves for maximum flexibility, multidirectional movement and foot strengthening. Stability feature at the outsole helps keep the foot from rolling during side-to-side movements.