The Big Bay Contour Sleeping Bag is a roomy, cold-weather bag rated for 40°F. It features Coletherm™ insulation for consistent warmth and a contour shape with a cinched hood that creates a built-in headrest. The Thermolock™ draft tube blocks cold air along the zipper, while the J-zipper footbox allows ventilation on warmer nights. Comfort Cuff™ and a soft fleece footbox enhance warmth and comfort. The ZipPlow design prevents zipper snags for smooth use.