Maybe the weatherman placed his bets wrong that day. Maybe you just flat-out ignored him. Whatever the reason, sometimes you’re caught out in the cold in a very literal fashion. Which is a good reason to keep a Livengood Shirt Jac at hand. It’s lightweight but packed with 3M® Thinsulate™ insulation to hold in heat. But the best part is that it stuffs down compactly into its own pocket, so you can stow one in your truck or camp pack and have an extra layer of warmth always at the ready.