The Apaches are built with attitude! They won?t take no for an answer as they willingly push the bounds of a 2-season bag. These bags have a full 3-Dimensionally sewn down filled collar to seal in heat when the weather takes a turn for the worse! The efficient cut lets you heat the bag quickly and gives you a lighter parcel to carry about. 19 oz. of high lofting down pumps up a durable 6? of loft. The Gore Windstopper shell is very weather resistant while remaining extremely breathable. The Apache in Gore Windstopper fabric is a very efficient package that is built like a pint sized winter bag. It?s full down collar and draft tube are capped with Gore Windstopper fabric. Gore Windstopper shell fabric provides maximum protection against external moisture. At a total weight of 2 lbs. 6 oz. you?ll be amazed just how much cold these bags will tame.