Under Armour SpeedForm Apollo Vent Running Shoes Synthetic-and-mesh ArmourVent mesh upper delivers true breathability in a light, stretchy, durable, fast-drying fabric Innovative UA Speedform technology delivers zero distraction while running Molded 4D Foam footbed conforms to your foot's exact shape, eliminating slippage 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