Therm-a-Rest Ohm 20F/-6C Sleeping Bag, Long, Balsam

SKU: TAROSBLB

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Review Summary

2025-06-09T20:00:00

Rated 3 out of 5

Its nowhere as warm as

Its nowhere as warm as it claims unfortunately.

Dagan J.

2025-06-02T20:00:00

Rated 5 out of 5

Light and Versatile!

This bag is incredibly light and warm. I love how I can open it up fully to use as a blanket on warmer nights as well. My partner has a 20 degree enlightened equipment revelate quilt and is jealous that the OHm has more loft, is roomier, AND packs even smaller!

Elizabeth S.

2025-02-11T19:00:00

Rated 5 out of 5

Long & Regular Zip Together?

Just ordered a regular size and im really excited it seems to have all the features i desire! I just have one question though -im curious if it is possible to zip together one long size and one regular size? Id like to have one for my larger partner and it would be super convenient if they still zipped together.

Parker

2025-01-07T19:00:00

Rated 5 out of 5

Ultralight Go To 3 Season Bag

Incredible! I was blown away at the construction quality, stitching and design features. The materials are extremely ultralight, yet plenty durable. The 900 Goose Down fluffs up super fast and stays in place during the night, no cold spots. Great color fabric very soft, packing size makes this the go to sleeping bag for all three seasons plus. Highly recommend the Ohm 20. I've had it in freezing temperatures with no issues. I'm using the long version.

Patrick L.

2024-08-30T20:00:00

Rated 5 out of 5

My favorite Summer and shoulder season bag

I've had the Ohm 20 degree bag for the past two years and it has been my go to bag during late spring through early fall. I find the bag quite comfortable down to about 25 degrees on its own, below that I sleep with a liner and have been comfortable down to 15 degrees. This bag is the perfect combination of light weight packability and camp comfort and I look forward to many more years of regular use from it.

Connor B.

2024-04-22T20:00:00

Rated 3 out of 5

Soft but not warm enough

Sleeping bag is very soft to the touch and extremely lightweight but unfortunately not warm enough for 40° let alone 20°, even with 9R of pads and a double layer of sleep clothing including a puffy. Also, the cinch cord at the top is too thin and poor quality and snagged on the cord lock during use, I think this would be better with shock cord. The bag could also be slightly roomier in the knee/hip area as my knee pressed into the side while side-sleeping and created a cold spot. I threw another cheap down bag over it to make it warm enough but for this price point I shouldn't have to do that. Very happy with the Xlite and Xtherm pads but unfortunately I will be initiating a return for this Ohm bag. I wanted to like it but I apparently I need something much warmer.

Cassandra

2024-01-01T19:00:00

Rated 4 out of 5

Perfect 32° semi rectangular

I love that this bag packs down so small. It worked perfectly for an overseas trip involving several nights in hostels. Also did a fall hunt trip is west Texas sleeping in the back of my truck, and an early season ski touring hut trip; ideal for all those situations. I flop around a lot sleeping so I love the semi rectangular design. I'm sure I'll try it out for some fast and light adventures in the CO Rockies next summer, but it probably won't be a shoulder season bag for me. Realistically, this is a 32°F / 0C bag (safety rating vs comfort rating) and I feel it should be labeled as such, just my opinion. The specs on the bag are clear about that and any smart consumer would read all of that before dropping the money. All that said, I love that a semi rectangular bag can pack down this small and I'm pleased to have added it to my gear collection.

Matthew B.

2023-11-13T19:00:00

Rated 4 out of 5

Left zip only?

I was looking for a compact, warm, right zip bag for hammock camping. Since the Ohm can pair up with another Ohm, I thought it could be right or left zip. However the baffle tube is set up for a left zip sleep, so unfortunately I had to return it.

Mark K.

2023-09-08T20:00:00

Rated 5 out of 5

Henri

Lightweight with excellent versatility. Have both the 32 and 20 version, to be able to mix and match within family. One small note: 32 and 20 slightly different lengths (at least in long size), but mainly cosmetic when pairing.

Henri N.

2023-09-08T20:00:00

Rated 5 out of 5

Henri

Lightweight with excellent versatility. Have both the 32 and 20 version, to be able to mix and match within family. One small note: 32 and 20 slightly different lengths (at least in long size), but mainly cosmetic when pairing.

Henri

2023-06-13T20:00:00

Rated 4 out of 5

Perfect But for Price

Purchased this Ohm 20F after a lot of investigating. I am a bicycle backpacker and wanted something light, compact, warm, give me room as I'm a side sleeper, and ways to adjust for various temperatures. This bag is the one that checked all the boxes that I wanted. Another box to check was to fit inside my Apidura 14L Expedition Saddle Pack and it does. The key is to only cinch the sack down about 90-95% of the way so the sleeping bag is a bit longer and not so wide. Then it easily slides in the Saddle Pack with enough room for a few other items like a change of clothes. I've not purchased other high end sleeping bags so I can't compare, but my first test was on an Erie Canal bike trip form Albany to Buffalo. The first night got down to 34F and I was toasty warm with no issues at all. The rest of the trip was warmer and I was happy. I've not used this bag in temperatures above 50F yet so can't say if it gets to be too warm but the full length zipper gives me hope it will work. I was able to sleep in various positions and never felt cramped. My only complaint is the price. Seems very expensive considering where it is made. But getting a good night sleep on a long adventure is priceless, I suppose, and I am thankful for that.

Steve H.

2023-06-04T20:00:00

Rated 5 out of 5

Best Bag I've owned

I have 4 nights of use so far with this bag and I can confidently say that it is the best sleeping bag I've used. My first outing I saw temperatures overnight in the 50's and being able to open the bag up and use it as a top quilt was perfect and kept me comfortable all night. The next time I used it I saw near constant rain and overnight temps down to 25 degrees. I remained warm and dry despite the conditions. The hydrophobic down was put to the test and it shined, I stayed warm enough that I didn't even need to use the closure at the neck of the bag to keep the warmth in! I am already looking forward to the next time I get to use the bag and all of my other sleeping bags/quilts will have to remain in storage for the foreseeable future.

Connor B.

2023-06-03T20:00:00

Rated 5 out of 5

Liked it so much, I bought two

I rarely leave reviews but felt I needed to. I rave about this quilt. I have a number of high-end bags and quilts. When I got my first Vesper 20F last year, the temperature was perfect for taking it on a few trips to try it out right away. I was immediately impressed. Most of my usage is in a hammock with a sleeping pad (R6+). I have used the Vesper with an under-quilt and ground sleeping. Whether ground or hammock, the Vesper is unmatched in terms of comfort, soft feel, freedom of movement (think your bed), perfect foot box, pack size, and weight. With the right insulation layers, I can easily take this below the limit rating. It's very warm and is the most comfortable quilt/bag I have, and I have closest's full of different makes and models to compare. I like it so much, I ordered a second. I even got the Questar 0F, Hyperion 20F, and Ramble blanket - I have not had a chance to use either the Questar or Hyperion. Because I love the Vesper so much, I wanted to give other ThermaRest products a try. Both Vesper's are still in mint condition. On one Vesper the tag with the temperature rating is peeling (less than a minor issue). I use them hard, but I'm careful around anything that might burn or rip them and store them fully lofted. I expect both will offer a lifetime of great night sleeps. If I could give it 10 stars, I would. Vesper 20F is a winner- best quilt on the market.

Dave L.

2023-06-03T20:00:00

Rated 5 out of 5

Excellent design.

It's a sleeping bag , it's a quilt. It's warm I'm happy with the no hood thing as well . Packs down small and is very light. It is delicate that's for sure . But that's how lightweight stuff is made.

Greg A.

2023-04-21T20:00:00

Rated 5 out of 5

Simply Amazing!

I'm suprised there isn't more reviews about this thing. Super warm, fabric is super soft, so versatile because it is so warm, but can be opened up on hot summer nights. I love the hoodless design because I find if you toss and turn you dont end up with the hood on your face. If you are camping super cold just bring a down beanie! Super light, packs down seriously tiny. Just amazing. Definitely highly recommend!

Clay

2023-02-14T19:00:00

Rated 5 out of 5

One stop shop.

Incredible summer bag for northern climate where temps can hover as high as 20 degrees Celsius at night or as low as 0. The versatility of the quilt like functions make this possible!

Matt S.

2022-06-27T20:00:00

Rated 5 out of 5

Love it.

Love it.

Chase W.

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Therm-a-Rest Ohm 20F/-6C Sleeping Bag, Long, Balsam Specifications

  • Fill Material

    900-Fill Nikwax Hydrophobic Down

  • UPC Code

    040818114049

About Therm-a-Rest Ohm 20F/-6C Sleeping Bag, Long, Balsam

FEATURED REVIEWS

Ultralight Go To 3 Season Bag

By Patrick L.

Incredible! I was blown away at the construction quality, stitching and design features. The materials are extremely ultralight, yet plenty durable. The 900 Goose Down fluffs up super fast and stays in place during the night, no cold spots. Great color fabric very soft, packing size makes this the go to sleeping bag for all three seasons plus. Highly recommend the Ohm 20. I've had it in freezing temperatures with no issues. I'm using the long version.

Light and Versatile!

By Elizabeth S.

This bag is incredibly light and warm. I love how I can open it up fully to use as a blanket on warmer nights as well. My partner has a 20 degree enlightened equipment revelate quilt and is jealous that the OHm has more loft, is roomier, AND packs even smaller!

The Ohm 20F/-6C down sleeping bag is the ultimate fast and light bag, balancing ultralight backcountry performance with surprising comfort and features.

Ultralight backcountry performance meets frontcountry comfort.

When you need ultralight weight and packability, but can't go without warmth and comfort, the Ohm 20F/-6C is hard to beat. Weighing in at just 1 lb. 6 oz (635g), the Ohm sleeping bag brings balance to backcountry pursuits with a roomy fit and the ability to convert into a two-person quilt. Filled with high-loft 900-fill Nikwax Hydrophobic Down, it delivers top-notch warmth-to-weight performance with moisture-resistant insulation that dries fast and compresses small. Thermally efficient box baffled construction maintains consistent warmth distribution while heat-mapped Zoned Insulation prioritizes key warmth areas. Ultralight shell fabric and high-loft down keeps overall weight and packed size to an absolute minimum.

Unique in its class, a full-length zipper extends completely around the footbox, allowing it to be opened flat as a quilt for added comfort and mobility on warm nights. Two fully unzipped Ohms can be stacked and zipped together to create a comfy double bag for adventure duos. Designed with the Therm-a-Rest commitment to quality and performance, the Ohm keeps your pack featherweight and versatile without sacrificing an ounce of performance.

Therm-a-Rest Ohm 20F/-6C Sleeping Bag, Long, Balsam Features

  • 900-Fill Nikwax Hydrophobic Down: PFC-free and absorbs 90% less water and dries 3x faster than untreated down
  • Responsible Down Standard Certified: Certification that ensures the waterfowl in the down supply chain are treated humanely
  • Unrivaled Packability: Ultralight shell material, insulation and precision design keep packed size to an absolute minimum
  • Roomy Fit: Semi-rectangular shape cuts weight while allowing for unencumbered sleep
  • Multiple Use Modes: Full-length zipper extends around the footbox; allows for use as a quilt, custom ventilation or mating with another Ohm sleeping bag
  • Pairable: Stack two fully unzipped Ohms and pair them for a cozy two-person sleeping bag
  • Refined Warmth: Box baffled construction uses mesh walls to maximize loft and minimize cold spots, while a drawcord at the collar seals in heat
  • Compression and storage sack included

Warranty Information

This product has a limited lifetime warranty.

Key Features

  • 900-Fill Nikwax Hydrophobic Down: PFC-free and absorbs 90% less water and dries 3x faster than untreated down
  • Responsible Down Standard Certified: Certification that ensures the waterfowl in the down supply chain are treated humanely
  • Unrivaled Packability: Ultralight shell material, insulation and precision design keep packed size to an absolute minimum
  • Roomy Fit: Semi-rectangular shape cuts weight while allowing for unencumbered sleep

What's in the box:

  • Therm-a-Rest Ohm 20F/-6C Sleeping Bag
  • Compression and Storage Sack
  • MFG Lifetime Limited Warranty