Down has long been the sportsman's choice for unbeatable warmth. Wear this all-new updated underwear on just one bitter cold day, and you'll quickly see why. The high-loft Cabela's Premier Northern™ Goose Down is guaranteed to loft to 550 cu. in per oz. More loft means more dead space for warm air to be trapped in. This trapped air creates a comfortable micro-climate around your body that is impenetrable to outside air. For added warmth retention we added a Therma-stat® collar and half-glove, thumb-hole cuffs to the top. The five-snap placket allows you to close up the top for total thermal protection or open it for ventilation when needed. The drawers also feature long Thermastat® cuffs that stay tucked into boots and socks, and a zippered fly. The outer shell is constructed of rugged, soft-touch nylon that helps repel moisture and feels comfortable and warm against the skin. Imported.