If your focus is building an ultralight backpacking system appropriate for a thru-hike of the Appalachian or Pacific Crest Trails, and you want pare your base weight down to less than 10 lbs, the Zpacks 20 Degree is one of two bags that we recommend for hikers that can afford them. We feel the Katabatic Gear Palisade 30, our Editors' Choice winner, is the best choice; its adjustable girth is a major plus compared to the ZPacks. Most of our testers found it warmer as well. But some folks still prefer a mummy bag, and the ZPacks 20 Degree is the lightest and warmest mummy we tested. If the price tags of these two models are prohibitive, check out our Best Buy Award winner, the Enlightened Equipment Revelation 20. It is nearly as warm, very versatile, and much more affordable.
ZPacks has updated the design of the 20 Degree bag for this season. The latest version is pictured above. Keep reading to find out how this new model differs from its predecessor.