Under Armour Women's UA Micro G Speed Swift Running Shoes Mesh^Synthetic Lightweight, breathable mesh - Locks down your foot and increases ventilation. Arch reinforcement construction - Provides precise fit and foot guidance. Full-length EVA sock liner - For added comfort and a custom fit. Full-length Micro G foam - Turns cushioned landings into high-powered take-offs. Anatomical rubber outsole - For natural traction and performance.