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You Are Here:   Home  >>   Gear   >>  What degree rating do you recommend for a year-round sleeping bag?

2008 Winter Buyer's Guide
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outdoor gear review
May 22, 2008

outdoor gear question
What degree rating do you recommend for a year-round sleeping bag?

outdoor gear question
outdoor equipment
Phantom Sleeping Bag (courtesy, Mountain Hardwear)
I snow camp, warm-weather camp, and do moderate mountaineering, so I need a good all-around sleeping bag. Is the Mountain Hardwear Lyell (rated to -15 degrees) suitable?

— Chris
Seattle, Washington


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outdoor gear answer

I used to have a single sleeping bag that I used for summer, winter, Rainier, and lowland camping. It was the REI Mountaineer—a bag they stopped making many years ago. I don’t know what the temperature rating was, as back then bags were basically “thick” or “thin.” My guess is that it was a zero-degree bag. And it was fine in the winter and up high. Everywhere else, it was pretty miserable to use. Especially if mosquitoes were buzzing around and the options were A) Zip up in bag and par-boil, and B) Unzip bag and become a human sacrifice.

So it would be with the Mountain Hardwear Lyell ($350). It’s certainly a lot of bag for the money, with 600-fill down, a waterproof shell made with Mountain Hardwear’s proprietary Conduit material, and a thick collar around the hood to keep drafts out. But it’s really a winter-only bag. Even an expedition-type bag. It’s okay for a winter trip in Rainier, perhaps, but if you climb Rainier or Hood in the summer, then it will be way too much.

So I tend to think an “all-around” bag such as what you are looking for is more in the 20-degree range. That will get you around during the spring, summer, and fall; will work well up to 11,000 feet or so on Rainier (during summer months); and could pull light duty in the winter with a bivy bag and an extra set of long underwear.

In Mountain Hardwear’s lineup, that would include the Phantom ($355), a +15 bag that uses 800-fill down and superlight nylon shell material to drive the weight down to just under two pounds (the Lyell weighs in at three pounds, four ounces). Marmot’s Helium ($359) is almost identical in every way—weight, temp rating, fill material (slightly higher fill rating for its down), and shell. Or there is Western Mountaineering’s Ultralite ($355), a 20-degree bag that shaves the weight to one pound, 13 ounces and features WM’s famously high-quality construction. That would be my choice, to be honest.

To boost the warmth a little, add a Rab Vapour Barrier Liner ($40). This waterproof shell goes inside the bag and works by preventing cooling through evaporation off your skin. As a bonus, they also keep your bag drier because skin moisture can’t work its way into the insulation and freeze or condense. A Cocoon Thermal Liner ($60) also adds degrees, taking a 15-degree bag down very close to zero.

The 2008 Summer Outside Buyer’s Guide is now on newsstands. Look for it online soon.




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