Conquer any trail with the Lone Peak 3.5 running shoe. Predecessor: Lone Peak 3. Support Type: Neutral to underpronation. Cushioning: Lightweight, flexible response. Surface: Trail. Differential: 0 mm. Altra 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 and trail racing. Designed to improve running form, toe splay, stability, traction, and comfort. FootShape™ toebox design allows the foot to splay naturally and maintain proper alignment, while absorbing shock and promoting a more powerful toe-off. Quick-drying, abrasion-resistant mesh upper features minimal seams to reduce the likelihood of irritation. Gusseted tongue helps keep debris out. Lace-up closure. Gaiter Trap™ features a tab to secure gaiter to the shoe without having to strap it below the outsole. Trail Rudder at back of heel. Light tongue and collar padding. Breathable fabric lining for a great in-shoe feel. No-slip sockliner design. Removable 5 mm Contour footbed. Zero Drop™ Platform promotes a natural foot strike and an efficient stride. Natural Ride system. Dual-layer EVA midsole with A-Bound™ top layer. Total Stack Height (total thickness of midsole and outsole underfoot): 25 mm. Altra MaxTrac sticky rubber outsole with TrailClaw™ for reliable traction over varied terrain. StoneGuard™ helps deflect rocks for a smoother, more stable ride. Last Type: SD5. Imported. Measurements: Weight: 10 oz Product measurements were taken using size 8.5, width B - Medium. Please note that measurements may vary by size.