Under Armour Men's UA Micro G Engage II Running Shoes Synthetic Breathable mesh &#38; foam upper with overlays designed to lock down your midfoot Internal TPU heel counter for greater stability Die-cut, full-length 4D Foam&#174; sock liner for added comfort &#38; a custom fit Full-length Micro G&#174; foam turns cushioned landings into explosive takeoffs Strategically placed flex grooves deliver a natural cushioned ride that moves with your foot