MeshImportedLug Sole soleSurface: Trail. Differential: 0 mm. Altra Zero Drop recommends that those new to natural running and zero-drop footwear transition slowly by wearing these on shorter runs and gradually building up to regular mileage. Natural-running-inspired shoe with a zero-drop differential and moderate cushioning, that is ideal for trail running, hiking, fastpacking, trail racing, and cold conditions. Designed to improve running form, toe splay, stability, push-off, traction, and comfort. NeoShell? uppeShrug off rain, snow, mud, and nearly any element Mother Nature throws your way, in the Altra? Lone Peak 3 Mid Neoshell trail-running shoe.Predecessor: Lone Peak 2.5.Support Type: Neutral to underpronation.Cushioning: Lightweight, flexible response.