The Comfort 800 is great for adventures in all four seasons when comfort is worth a few additional ounces. The 3-D over-sized draft collar prevents warm air from being pumped out of the bag, making it perfect for winter and cold sleepers. Although Comfort bags have a comforter design, connecting two bags together is simple and quick with a two section zipper. It’s warm, compact, spacious and versatile. A separate zipper around the foot box allows the bag to be opened for use as a blanket.