Vasque - Catalyst (Grey/Light Grey/Red) - Men's: Lace-to-toe styling, a Stealth rubber outsole, and breathable Airmesh and leather uppers make this trail trainer perfectly suited to long approaches and moving fast over variable terrain. 1.6mm Water Resistant Split & Nubuck Leather plus Nylon Mesh Fabric upper for outstanding comfort and durability. EVA-lution midsole. Revolution w/ Stealth Rubber outsole technology for maximum shock absorption and traction in varying terrains. Nylon lining for additional comfort and support. Contoured EVA footbed. Gusseted Tongue. TecTuff Rand. Running Last. Shoe weighs 2 lb 0 oz. More supportive than a trail runner, yet still built for athletic performance.