3-and-1 warmth. The Duncan Jacket is really two jackets: a shell made with our recyclable DRYPLAY 20K/15K PFC-free membrane for maximum waterproof breathability and a removable warm inner jacket insulated with 100-g Primaloft Eco. This body mapping constructed jacket includes a Teflon Ecoelite™ PFC-free durable water repellent treatment, and a Coremax lining that eliminates cold spots. The fully-taped seams, wrists gaiters, and YKK waterproof zippers keep moisture out. For enhanced protection and fit, the hood, cuffs, and powder skirt that attaches to your pants are all adjustable. Choose the right level of warmth all season long based on your outing and the weather.