Durable mesh upper features full eVent waterproof bootie construction to lock water out and keep your feet dry in wet conditions; Flexible ESS rock plate protects against stone bruising caused by sharp rocks and roots; Roomy Toe Box allows toes to spread naturally and comfortably; OrthoLite Performance insoles with long-term resilience and anti-microbial properties; Vibram Megagrip outsole delivers excellent traction and slip resistance; Stack Height: 25mm (heel) / 22mm (forefoot); Heel to Toe Drop: 3mm; Weight: 12.0oz (M9); Best for Trail Running, Hiking