Men's Hoka Challenger ATR 7 Running Shoes From pavement to gravel, smooth or rocky, your updated Challenger 7 trail running shoes are built to handle it all. From heel-to-toe include gravel tire-inspired lugs on the outsole to grab with more traction as you conquer uneven terrain. Each step will feel lighter and more comfortable adding a simplified mesh upper and super-soft foam. Increased stack height being the epic addition to your Challenger 7.