Western Mountaineering Ultralite 20 Degree

Welcome to Western Mountaineering sleeping bags — simply some of the best in the world.

If you’re planning a thru-hike, tackling the John Muir Trail (JMT), or heading out for backpacking, fishing, or hunting trips, the Western Mountaineering UltraLite 20 is a standout choice. When Western Mountaineering says a bag is good to 20°F, they mean it. Put it next to most other “20-degree” bags and you’ll immediately notice the difference in loft, warmth, and overall build quality.

The full down collar helps seal in heat around your neck without adding unnecessary bulk, while 16 oz. of high-loft down gives the UltraLite an impressive 5 inches of loft. Even with that warmth, the total weight is just 1 lb. 13 oz., and it compresses down small in your pack.

Another reason we carry Western Mountaineering: they’re a small, independently run company like us, built by people who actually care about time spent outside and the gear that makes it better.

At Eastside Sports, we’re also owned and operated by former (for now) thru-hikers. The owners are 2015 PCT southbounders. Past employees who are still part of the shop but now retired hiked the PCT in the 1970s and 1980s, and other team members have worked as backcountry rangers in multiple national parks.