The Feathered Friends Hummingbird is one of the lightest and most versatile traditional style 20-degree sleeping bags we've tested. However, it is only available directly from the manufacturer, the wait time to get it is 1-4 weeks, and you are unlikely to find it on sale. Our top-rated bags easily available from retailers are the Western Mountaineering Alpinlite and the Western Mountaineering Ultralite. Both scored close to the Hummingbird and are excellent options.
If you can get past the idea of waiting for the sleeping bag, you won't be disappointed. This efficient, 25 ounce, 900-fill down stuffed cocoon is warmer than all other bags that weigh a similar amount. The Hummingbird is our favorite fully featured sleeping bag (with an attached hood and full-length zipper) for both camping AND weight conscious activities. If we were to have one single sleeping bag for all types activities it would be the Hummingbird. Every part of the bag, including the design, the fabrics, and the USA-made construction quality are the best available.