The North Face - Sieve (Aviator Blue/Q-Silver) - Men's: The name says it all. Ideal for a multitude of fast-paced activities where drainage, breathability and dryness are key. Synthetic nubuck leather upper. Open air sandwich mesh. Molded rubber heel strap. AgION(tm) anti-microbial lining and X-2&trade footbed cushioning offers the best combination of durability, lightness and energy return to protect your joints. Cushioned lightweight EVA midsole. 2/3 - length lightweight, perforated nylon shank with nylon forefoot plate enables your foot to flex comfortably and protects it from sharp rocks. HydroTrak(tm) rubber outsole.