Free 2-Day Shipping on Orders Over $50* - Limited Time Only


A four-season sleeping bag that's light and packable for your overnight ski-touring needs.

Rest peacefully in the Therm-a-Rest Altair 0 Degree Down Sleeping Bag while you listen to the soothing sound of snow blanketing your four-season tent. Designed to keep a gal comfortable in 26F or a guy warm in 14F (according to EN comfort ratings), the Altair is just the bag to pull from your pack after a full day of ski touring or mountaineering. Plus, it's Synergy Connectors bring your sleeping bag and mat together for uninterrupted sleep.

  • EN rating is 14F for the lower limit (an average man’s comfort level) and 26F for the comfort range (average woman’s comfort level) for cold nights in the backcountry during your mountaineering or backcountry ski expeditions
  • EN ratings are developed from procedures and testing conducted by independent organizations in the US and Europe
  • Lightweight, compressible 750+ fill goose down insulation provides optimal warmth
  • Zoned Insulation features three-dimensional baffled insulation on the top, sewn-through down insulation on the sides, and a fabric-only bottom designed to partner with your sleeping pad, which provides insulation beneath you
  • Mummy-shaped bag decreases cold spots, weight, and packed size
  • Efficient Comfort fit design has extra room in the torso to allow your shoulders, elbows, and hips to move freely while a closer fit around the head and feet keeps you warm
  • A 30D ripstop nylon shell offers lightweight performance while a DWR coating supplies protection against the morning frost
  • Sculptured hood, trapezoidal footbox, draft tubes, and collar insulate your body and prevent the cold from seeping in
  • Left-side, snag-free zipper offers an easy in-and-out
  • Synergy Link Connectors consist of two flexible fabric bands that keep your bag centered on your sleeping pad so you won't slip off during the night (connectors fit any sleeping pad up to 25in wide)
  • Internal stash pocket holds your headlamp or beanie
  • Includes storage and stuff sack

Share your thoughts

What do you think of the

Therm-a-Rest Altair Sleeping Bag: 0 Degree Down

? Share a...

Write a review

No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

    Add a:
  • Share a photo
  • Share a video


Only jpg, jpeg, png, gif or bmp files please.

Submit Cancel
Now review from the App. Download

Here's what others have to say...

5 5

Bellingham, WA

  • Gender: Male
  • Familiarity: I've put it through the wringer

Comparison of weight, price, temp, compaction, the quality of production and its design criteria. I give it 5.

I have been using this bag for overnight backcountry snowboard trips and weekend camping in the north casecade.

I purchased a regular size and I am 5"10, 160lbs. This sleeping bag is kind of loose fit around the head and shoulders area. Is plenty room to moves, turns and crossed my arms. This sleeping bag is flat hood. It covered up to my eyes and chin. Leave partial of my face exploded between my nose and mouth. This helps me not to get drenching inside the sleeping bag when i slept on my side.
Those two flexible bands on the back for the sleeping pad. It helps position me on the pad when camp out on the uneven compacted snow ground or on the slopes.

On the temperature wise. Everyones body/metabolism is different. I am the hot sleeper. So this bag is toasting to me on the mt. This is a top bag. It means that all the insulation is filled more on top than the back side of the bag. You will need to have a sleeping pad.

Water resistant. Out here in the North Cascade everything always going to get wet. But this bag is withhold the dryness just fine. As long as you don't put it out in the mist rain.

If you are looking for a sleeping bag for a *MILD WINTER* that is light weight, warm, water resisted and compacts to both of your backpack and wallet. I recommended you this is the sleeping bag you should be considered.

Are Therm-a-Rest sleeping bags made in the...

Are Therm-a-Rest sleeping bags made in the USA?

Found on another web site saying they are made in China. Dang it!!!

Yes their bags are made in China, but Therm-a-Rest manufactures all of their sleeping pads in Seattle, Washington at the Cascade Designs manufacturing facility.

GEAR REVIEW: Thermarest Altair Sleeping

Very promising line of sleeping bags from Thermarest. Check out my video review of the Altair... I was impressed.

5 5

Excellent Sleeping Bag

  • Familiarity: I've used it several times

I purchased this for my fiance to keep her warm while backpacking (I use the Antares). This bag does a great job, it's just like the Antares but with a little down underneath the bag, rather than the zero down the Antares has underneath your body. The stuff sack for this should be smaller, as this bag could easily get into a smaller compression sack. If you want to know a little more about it, check out my review of the Antares. They are the exact same bag, just this one is a zero degree (resulting in a slightly heavier/bulkier bag).

Compressed Bag

Compressed Bag

This picture doesn't quite do it justice. This packs down SMALL, as well as light. It doesn't compact down as small as the Antares, but then again, this is a zero degree bag. I fit this bag (which belongs to my fiance), my BA Q-Core, the Thermarest NeoAir pillow, and my rab generator, and a rain jacket all in the bottom compartment of my Deuter Aircontact pack. Great backpacking setup!

NEW! Therm-a-Rest? 4-Season Sleeping Bag

A true four-season sleeping bag needs to be warm down to 0F (-18C), while still being light and packable enough to make your days in the mountains enjoyable. Therm-a-Rest's four-season series includes the down-filled Altair sleeping bag and the synthetic Centari sleeping bag. Watch our video to learn how Therm-a-Rest sleeping bags let you to sleep better and go farther...