Innovative UA Speedform® technology delivers zero distraction while running Seamless heel cup with silicone grip for a locked-in, anatomical fit Smooth, ultrasonic welded seaming with Bemis tape for next-to-skin support & comfort ArmourVent™ mesh upper delivers true breathability in a light, stretchy, durable, fast-drying jacquard knit fabric Adjustable lock down heel strap improves fit Upper features 360° reflectivity 6mm molded 4D Foam® embedded within the sockliner for added cushioning & moisture wicking capabilities paired with seamless comfort Charged Cushioning midsole: it's cushioned AND responsive. Most foams do one or the other, but Charged Cushioning does both. Better. A second layer of Micro G® foam helps turn cushioned landings into explosive takeoffs Added cushioning in the heel & strategic flex grooves in the forefoot work with your natural stride Solid rubber outsole covers high impact zones for greater durability with less weight Offset: 8 mm Weight: 8.4 oz.