Under Armour Men's Micro G Pulse 2 Grit Trail Running Shoes Synthetic Synthetic overlays for stability & to lock in your mid foot. Upper uses light, supportive foam sandwiched between durable ripstop on top & breathable mesh below. Full-length Micro G foam turns cushioned landings into explosive takeoffs. Die-cut, full-length 4D Foam sock liner for added comfort & a custom fit.