Under Armour Men's UA Assert Running Shoes Synthetic Formfitting, breathable mesh upper delivers super lightweight performance Low profile ArmourBound&#174; midsole works with your natural footstrike to provide maximum comfort with every stride Carbon rubber covers the impact and abrasion zones for long-lasting wear Durable foam covering gives full ground contact without adding any extra weight Die-cut sockliner prevents internal slippage, keeping your run comfortable and your feet locked in