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.