A sleeping bag is one of the most important pieces of camping gear. Choosing the right sleeping bag can help keep you warm (but not too warm), cozy, and rested. We’ll say it again: A good sleeping bag can be one of the most crucial investments an outdoorsperson makes. Choose a sleeping bag wisely, and it will fit your body shape and chemistry perfectly. It will suit your activities and weather conditions. Extra comforts will add a slice of luxury to rugged adventures for literally decades. But choose blindly and you risk losing comfort, money, and sleep. Don’t fret — that’s why we’re here. In addition to all the sleeping bags we’ve tested while camping the past year, we took more than 20 sleeping bags from top brands into the mountains of Colorado for a thorough camp gear test. Our goal: Find the best sleeping bags on the market right now. And not just our favorite, but also bags that meet the needs of the budget-conscious, ultralight enthusiasts, side-sleepers, and more. To evaluate the best sleeping bags, we took key performance factors into account, like warmth-to-weight ratio, temperature rating, construction, and features. But we didn’t limit ourselves strictly to new sleep...