Light enough for minimal bulk. Warm enough to beat chills. And loaded with not one but TWO outstanding scent control technologies. Gold+Alloy technology utilizes gold and silver particles embedded in the fabric to control bacteria on an atomic level, stopping odors before they start, while Carbon Alloy® technology helps to eliminate existing odors. It's a one-two punch of scent-stopping effectiveness that works, even when you're working up a lather! On its own or as a layer, you can count on it for comfort and stealth.