Altra Olympus 275 HiLo - Women's Built for ultra-runners and all-day trail adventurers, the Altra Olympus 275 HiLo blends plush, fatigue-fighting cushioning with fierce, adaptive grip. Featuring an updated Altra EGO™ MAX midsole, a Vibram® Megagrip outsole with TractionLug™, and a durable MATRYX® woven upper, this shoe is tuned for long, technical trail miles from training runs to ultra race day. Specifications Weight: 249g / 8.85oz (Women's US Size 8) Heel-to-Toe Drop: 0mm Stack Height: 33mm heel / 33mm forefoot Midsole: Altra EGO™ MAX — 15% lighter and 10% softer than the previous version for a plush, fatigue-reducing feel Outsole: Vibram® Megagrip with TractionLug™ for adaptive traction and stability on wet or dry terrain Upper: MATRYX® one-piece woven upper with a built-in scree sleeve for debris protection Key Features Altra EGO™ MAX Midsole – Lighter, softer cushioning that holds up mile after mile on long, technical days Vibram® Megagrip Outsole – Fierce, adaptive grip and stability across wet rock, loose dirt, and steep terrain MATRYX® Woven Upper – High-performance, durable construction built to withstand technical trail abuse Original FootShape™ Fit – Altra's roomiest toe box gives toes space to move naturally through the midfoot Zero-Drop Platform – Promotes natural movement and stride mechanics over long miles Ideal For Runners looking for all-day comfort and confident grip on demanding terrain. Perfect for technical trails, ultra-distance adventures, and neutral runners with wider or roomier feet who want a natural, zero-drop ride without sacrificing cushioning.