Under Armour Speedform Fortis 2 Running Shoes The Under Armour Speedform Fortis 2 provides excellent breathability while ensuring ultimate comfort in the midsole thanks to the Charged Cushioning and Micro G foam. Breathable Upper The upper of the Under Armour Speedform Fortis 2 Running Shoe is constructed with a breathable, three-colour knit mesh upper which locks down your foot and increases ventilation. The laser-cut perforations in the upper will improve breathability, keeping the feet feeling cool and comfortable. Cushioned and Responsive Midsole Equipped with the innovative Under Amour SpeedForm technology, it delivers an unprecedented precision fit for an unrivalled comfort with no distractions. UA SpeedForm's perfect seamless heel counter is built for a sleek and lightweight structure while the ultrasonic seaming with Bemis tape on the lateral and medial sides offer next-to-skin support and comfort. With a dual-layered midsole, it combines Charged Cushioning on top of Micro G foam. The Charged Cushioning absorbs impact and converts it into a responsive burst giving each step explosive power. Micro G foam is 30% thinner than it's standard counterparts as it works to decrease the overall weight of the shoe and offers a low-to-the-ground ride and responsiveness. By allowing the foot to be lower to the ground, it provides the wearer with a better feel for what's underfoot, and it enhanced the ability to change direction quickly. It's also designed as a high rebound, low compression set foam. "High Rebound" is another way of saying that is it has a higher level of bounce and responsiveness, which gives you a little extra lift and energy return. To provide extra comfort to the wearer, an embedded sockliner within the cavity of the midsole ensures added cushioning, moisture-wicking and seamless comfort. Durable Outsole The outsole provides added cushioning in the heel and the strategic flex grooves in the forefoot work with your natural stride