Under Armour Micro G Spine Evo - Women'sUnder Armour took their original UA Spine System and enhanced it to meet your needs. The Under Armour Micro G Spine Evo running shoe is remarkably lightweight with a streamlined chassis to give you ultimate structure and support, resulting in a faster running shoe and a faster you. The full-length Micro G foam cushioning offers a lightweight, responsive ride. The 4D foam sockliner conforms to your foot's exact shape to eliminate internal slipping for locked in comfort. Breathable mesh with structured overlays offers a supportive, lock down fit. A solid rubber outsole covers high wear areas without adding weight for lasting durability mile after mile. 6.2 oz.