The Argali Alpine 0 is a super warm zero-degree sleeping bag insulated with 850 fill power goose down that’s optimized for cold-weather camping and backpacking. Designed for people with broad shoulders and wide hips, the Alpine 0 is incredibly warm and features an overstuffed neck baffle, overstuffed draft tubes, a two-way, anti-snag zipper, and an ultralight Pertex Quantum fabric shell.  Argali is a boutique gear manufacturer that specializes in ultralight hunting gear, incorporating the design patterns and best practices of premium backpacking equipment manufacturers in products purpose-built for hunting customers.

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• Temperature Rating: 0F (Comfort)
• Gender: Unisex
• Insulation: 850 Fill-power down, not treated with waterproofing agents
• Down insulation weight:  Regular 31.0 oz; Long 34.0 oz
• Sleeping Bag Weight: 2 lbs 12.5 oz (Regular) 2 lbs 15.8 oz (Long)
• Size (Inside Girth): 64″ Shoulder / 58″ Hip / 40″ Foot
• Length: Regular size fits sizes up to 6′ 1″; Long fits up to 6′ 7″
• Fabric: 15D Pertex Quantum (PFC-Free DWR)
• Zipper: 3/4 length, two-way anti-snag
• Baffle Loft: 7″
• Stuff Sack Size: 8.5″x19.5″

Down Insulation

The Alpine 0 is a high loft sleeping bag insulated with 850 fill power goose down.

The Argali Alpine 0-degree sleeping bag is insulated with 850 fill power European goose down that has not been treated with a waterproofing agent. This is not the norm for hunting gear manufacturers, where waterproof down is still considered a must-have. Argali went with untreated down because premium backpacking sleeping bag and quilt manufacturers such as Enlightened Equipment and Feathered Friends use untreated down instead of down that has been coated with a waterproofing agent. Namely, it maintains its loft and insulation value longer, over many years, and is naturally water repellent already.

The insulated in the Alpine 0 is arranged in horizontal and vertical baffles to prevent down shift and keep the down from migrating with use. To shed weight, the fabric has a differential cut, meaning inner lining fabric is cut smaller than the outer shell fabric, allowing the down insulation to fully loft and maintain its warmth by providing more space between the inner lining and the outer shell, even when the sleeper moves or applies pressure on the bag; essentially, the outer shell can expand to accommodate movement while the inner lining stays stable, preventing compression of the insulation.

The draft collar has a snap on the left to connect the top and bottom of the collar and seal in your body heat. .

Sleeping Bag Draft Collar and Draft Tubes

The Alpine 0 has an extra thick draft collar that loops over the chest and around your neck and upper shoulder seal in warmth. The draft collar snaps closed with a plastic snap on the left and has a drawstring on the right to tighten it and prevent warm air from leaking (more on this below). This is the biggest and puffiest draft collar I’ve ever used on a sleeping bag, including -20 degree bags from Western Mountaineering, NEMO, and Brooks Range Mountaineering.

The Alpine 0 has a two way anti-snag zipper and thicker fabric further protects the liner and shell from snags.That’s hard to see here because its the same color as the liner and outer shell.

The side draft tubes are similarly oversized. Argali also uses a two-way, anti-snag YKK #5 zipper and runs two strips of extra heavy fabric along the top and bottom of the zipper to prevent it from snagging the fabric. This is a feature only found on premium cold-weather bags. I didn’t experience any zipper snags with this bag, and you won’t, given the way it’s constructed.

Mummy Hood

The hood is large and heavily insulated. Argali sells a synthetic insulated pillow that fits into it and is worth using to take up some of the volume since the extra hood volume can be a little cumbersome. Third-party pillows can also be used. Argali’s pillow can be used as is, or you can stuff more clothing inside it to beef it up, although I find it sinfully comfortable as is. It has small hidden buttons in the seams that connect to buttonholes in the bag to hold it in place.

The hood has plenty of space to add a pillow.

The size of the mummy’s face opening is controlled by a shared cord lock, which is also used to tension the draft collar: both can be tensioned independently from one another, so you can tighten the draft collar while loosening the hood. The front of the hood is surrounded by its own down-filled draft tube, so your head is going to stay toasty warm.

Sizing

The regular-sized Alpine 0 is sized for people with wide shoulders and hips. While that’s good if you like to augment your sleeping bag with additional layers of clothing or store water inside it to prevent it from freezing overnight, it can make a bag colder if it is too large. When shopping for cold weather bags, be sure to take fit into consideration since an oversized bag can take longer for your body to heat up. On the flip side, that extra room can make things much more comfortable, especially since winter nights are so long, and you’re going to be in the bag for a long time. I weigh 175 lbs and found the Alpine 0 to be large for me. If this happens to you, you can shim out the extra space with clothing or a down puffy to reduce the time it takes to heat it up.

Comparable 0-degree sleeping bags

Recommendation

The Argali Alpine 0-degree sleeping bag is a highly refined cold-weather sleeping bag designed for hunters and wilderness adventurers. It’s made with premium materials and features that are on par with the best sleeping bags used by backpackers. Sized for larger individuals, it’s quite spacious and comfortable to sleep in, despite being comparatively lightweight. Argali makes other gear, including ultralight tents that will also be of interest to backpackers. I’d encourage you to check out that gear, too.

Disclosure: Argali donated a sleeping bag for review.

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