Treat your feet to the cushioned ride and breathable feel of the Under Armour Nitrous. Durable mesh upper with welded overlays that add structure and support. Molded 4D Foam sockliner conforms to your foot's shape to prevent slipping. Dual-layer Micro G midsole foam for responsive cushioning. Blown rubber outsole provides traction without adding weight. Anatomically placed flex grooves improve heel-toe transition for a smoother ride. Wt. 8.7 oz.