This is a medium weight jacket that performs like a heavyweight. The 200g PrimaLoft insulation ensures you stay warm in the coldest of cold, without all the extra bulk that holds you back. It's got drawcord cinches at the hood, neck, and hem to trap your body heat inside, plus a full lining to keep things comfy. And the whole thing's constructed in a water-repellent nylon that's durable and flexible—and ready to protect you from whatever elements come your way.