The GWS shell of the Western Mountaineering Sequoia Super GWS Sleeping bag is the most water resistant-breathable fabric suitable for sleeping bags. In the GWS sleeping bags you’ll find the down filled collar and draft tube are constructed with GWS fabric for all of its parts. These Western Mountaineering Super GWS Sequoias have a full down collar solidly stuffed with down to provide a protective seal from the bellows effect as you move about inside your bag. The continuous baffles allow you to adjust the down fill to suit the changes in weather. Its two zippers not only allow you to zip to mummy bags but also to unzip the foot so that it can lie out flat. The Western Mountaineering Sequoia Supers are your best friend when you need room during the most weather prone climates.