Snugpak Bivvi Bag OliveThe Snugpak Bivvi Bag is designed to envelope your sleeping providing an extra layer of protection and warmth, it can also be used as a standalone bag in the warm summer months. Drawcords at the head mean the bag can be tightened to leave only your face exposed if desired. This lightweight bag is waterproof, windproof and wicks away moisture effectively, it can also be neatly packed away into the included mesh bottom stuff sack taking up very little