Lightweight and responsive, the Under Armour Speedform Fortis features a fast-drying, reflective upper to keep you safe and visible when running at night. Seamless SpeedForm upper with breathable ArmourVent mesh and heel cup for a comfortable, locked-down fit. 4D Foam footbed sockliner is embedded in the midsole for extra cushioning and moisture wicking. Dual-layer midsole features Charged Foam for responsive cushioning and Micro G to turn cushioned landings into explosive takeoffs. Flex grooves in the forefoot help encourage your natural stride. Strategically placed rubber in high-wear areas of the outsole for greater durability and traction without adding weight. Wt. 8.4 oz.