A windproof layer and an active insulation puffer-the Timberline Pro Jacket is a hybrid solution that checks both boxes on your packing list. We made it to streamline the gear system of ounce-counting hunters-the ones pushing days of hiking and thousands of vertical feet from the truck. When that's your route, this is the layer that keeps up.WINDSTOPPER(R) With Stretch protects you from icy ridgeline gales while allowing you to move freely as you navigate obstacle courses of deadfall timber. Breathable PrimaLoft(R) Silver Active insulation keeps you warm when you need it and keeps you from overheating when you're scrambling your way up a scree field to your glassing knob. If you're packing one jacket for your backcountry hunt, this is it.