Under Armour Women Micro G Optimum Night Running Shoes fabric-and-synthetic Super-breathable mesh upper with Synthetic toecap detail for extra durability Seamless semi-bootie tongue construction helps eliminate slippage & chafing Full-length Micro G midsole creates an incredibly lightweight & responsive ride Molded 4D Foam footbed conforms to your foot's exact shape, eliminating slippage Durable blown rubber outsole for the perfect blend of durability & traction