I provide a complete sleeping bag review of the North Face Furnace 20° down sleeping bag. The backpacking sleepingbag is a mummy shaped bag with a goose down fill. The North Face Furnace is arguably the best winter sleeping bag for cold weather backpacking and a really good winter sleeping bag. It has a 600 pro down fill and weighs 2lbs 12oz. When figuring out how to choose a sleeping bag temperature ratings are important when selecting a warm sleeping bag for camping or backpacking. The North Face Furnace 20 Degree Down Sleeping Bag is in my opinion the best winter sleeping bag of 2019.