Stay warm and dry in the harshest conditions with 509's Active Layering System featuring Cold Armor technology. Pairing 509's base and mid layers with 509's outerwear creates a high-performance layering system that works together to keep you comfortable no matter what. The 509 FZN LVL 2 Pant brings the heat by trapping warmth and wicking away heat-robbing moisture with a tech fleece fabric that slides easily under your outerwear. A team favorite on and off the machine.