Big Agnes' Big Pine Sleeping Bag is a rectangular bag that's light enough for backpacking and protective enough for camping in wet weather. Stuffed with 700 fill down insulation, the Big Pine brings the lofty warmth without much weight. Big Agnes treated the down with DownTek water resistance to retain warmth in moist conditions, and the shell is water resistant for extra protection. The Big Pine does double duty when you convert it into a comforter by unzipping the full length zipper. Its quilted lining should keep you comfy whether you're watching a football game in fall, a music festival in spring, or a campfire during the summer.