Sleeping in your sleeping bag after an extended hike is among the best benefits of backpacking. The bags of today offer incredible warmth for the weight with a myriad of techniques that allow them to keep dry and work in a range of conditions. Most of the bags listed here contain down that is more breathable, warmer, and more flexible than synthetic insulation, but we did include several of the top synthetic models. For more information on the subject check out our comparison table for sleeping bags and buy-in tips below the top picks.