Altra went all in on tech so you can go all out on the trail. It’s got durability, protection, and lightweight comfort from top to bottom. We partnered with MATRYX® to design a one-piece woven upper that’s lightweight and protective, for high performance and high mileage. Protect your feet from debris with a built-in scree sleeve. A zonal fit lock is designed to deliver a confident, secure fit while a TPEE sock liner helps improve underfoot longevity. Get grip on any terrain with a Vibram® Megagrip outsole, designed to help with traction on wet and dry surfaces. It’s got a compression-molded EVA midsole with lightweight cushion designed for comfort that lasts. With our roomiest toe box and zero drop, your feet are positioned for natural movement. Go all in on your next ultra or long trail run. No matter what the day throws your way, the Olympus 275 will help keep you comfortable and protected all day, on all terrain.