Climb the ups and fly the downs in the Altra Olympus 275 HiLo, a max-cushion men&';s trail running shoe built to deliver confidence, durability, comfort, and grip over the most technical terrain. From all-day training runs to the starting line of an ultra-trail race, it&';s built to send it all day (and all night). An updated Altra EGO(TM) MAX midsole foam - 15% lighter and 10% softer than before - delivers a plush underfoot feel with every step, while a VibramA(R) Megagrip outsole with TractionLug(TM) provides fierce, adaptive traction and stability on wet or dry ground. Max cushion, zero-drop platform for natural movement and all-day comfort on the trail Altra EGO(TM) MAX midsole - 15% lighter and 10% softer for a plush, responsive ride VibramA(R) Megagrip outsole with TractionLug(TM) for confident grip on wet or dry, technical terrain MATRYXA(R) one-piece woven upper built for high performance and durability, with a built-in scree sleeve to keep out debris Original FootShape(TM) fit - Altra&';s roomiest toe box with space through the midfoot so your toes can move freely Ready for all-day trail training and ultra-distance racing Available in two colorways - BLACK/BLACK/BLACK and ULTIMATE GREY/SEA PINE - in men&';s sizes 5 through 15 (including half sizes). Tackle technical trails in a shoe loaded with cushion, grip, and go-all-day comfort.