Under Armour Micro G Split II Women's Running Shoes Mirco G Foam Midsole - Delivers light, low, ultra-responsive performance cushioning for enhanced stability and comfort. Seamless HeatGear fabric - Highly durable, the fabric wicks sweat away to keep your feet cool and dry. Carbon and Blown Rubber Outsole - Tough and lightweight providing superior traction. External TPU Heel Counter - With molded Ortholite sockliner deliver a locked-in, slip-free fit. Soft Synthetic Upper - Makes the shoe nice and lightweight but increases durability and life span of the shoes.