Northstar Tactical Coretech Sleeping Bag (Blue)
Coretech Sleeping bags are designed off a very simple principle, keep your core warm and your warmth will circulate through your body. It is the same reason you were a winter jacket and not a bodysuit. Putting this 3rd layer only in the core area also lets you get more warmth with less total insulation in the bag. Don't pack around the extra weight, warm your core.