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Thermarest Oberon Sleeping Bag Test | Photo Mike Hardaker Mountain Weekly News
Professional Sleeping Bag Reviews: All-Season

Therm-a-Rest Oberon 0 Sleeping Bag Review

Mike Hardaker
February 15, 2019 3 Mins Read
1.3K Views
1 Comment

I have started winter camping and was looking for a sleeping bag that would allow me to camp out in temperatures under  32 F ( 0 °C) as well as double as a sleeping bag I could use in the spring, summer and fall. The question is can the Therm-a-Rest Oberon can work in variety of temperatures or is it solely for winter camping?  A Therm-a-Rest Sleeping Bag is perhaps the last sleeping bag you will ever need to buy.

Trail Map
1 How does it Feel?
2 Insulation
3 Who is this Sleeping Bag For?
4 Therm-a-Rest Oberon 0 Sleeping Bag Pros & Cons
5 Overall Impression

How does it Feel?

Fall Camping in Wyoming
Therm-a-Rest Oberon Sleeping Bag | Photo Mike Hardaker Mountain Weekly News Gear Reviewer

One of the first things you will notice about the Therm-a-Rest Oberon 0F/-18C  Sleeping Bag is just how darn soft the thing is inside and out.  Think comfort here, in fact, I sleep better in this sleeping bag outdoors than I typically do indoors.  The outside of the sleeping bag is made of 20D Polyester Ripstop.  This material has been durable and resistant to tears and punctures so far.

At 5’11 I opted for the Long version of this sleeping bag.  For anyone that likes to really stretch out,  the added weight and size of upgrading to the long bag is a no brainer, and won’t add any noticeable weight to your pack, but makes a huge difference when it comes to getting a good nights sleep camping.

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Insulation

Camping in Wyoming
Cozy Sleeping Bag for Year Round Camping | Photo Mike Hardaker Mountain Weekly News

For insulation Therm-a-Rest uses 800-Fill Down that’s super cozy, keeps you warm and in the event it gets wet, the down material Therm-a-Rest uses dried much quicker than other bags on the market.  The inside of the sleeping is made with a 20D Polyester Taffeta that makes sliding in and out of the bag a breeze.  Actually, at times you may find yourself sliding around more than you would like as the entire sleeping bag inside and out is slick.

Therm-a-Rest wants you to pair their sleeping bags with the brands sleeping pads.  Knowing their material was slick, they added removable connectors or straps to secure your bag to the sleeping pad.  However I never actually used the straps so not sure how they work.  Find a level spot to camp and you should be fine.  Set up camp on an incline and you will slide around in this bag.

Side sleepers will love the Therm-a-Rest Oberson Sleeping Bag as it adds extra room, especially the Long version is 32.5″ wide, the Regular Bag 31″ wide and the small comes in 28.5 inches wide.

Who is this Sleeping Bag For?

Skiers, climbers, adventures and your everyday camper will love the warmth, lightweight feel and packability of the Thermarest Oberon 0 Degree Bag.  Keep in mind this bag is not just made for winter camping.  If you plan on camping in temperatures well below zero you’ll want to look for a bag with a comfort rating around -20F such as the Therm-a-Rest Poler -20 Sleeping Bag.

EN Sleeping Bag Rating for Temperatures

Therm-a-Rest Oberon 0 Sleeping Bag Pros & Cons

Pros:

  • Super cozy 800-Fill Down insulation
  • Soft and comfortable for a good night’s sleep
  • Offers extra room for side sleepers

Cons:

  • May slide around due to slick material
  • Straps to secure bag may not be useful

Overall Impression

The Therm-a-Rest Oberson Sleeping Bag packs down small, is incredibly warm and best of all feels amazing when wrapped around your body. This is the sort of sleeping bag that will make it difficult to pull yourself out of on cold days.  You won’t want to leave this comfort behind. Having tested a handful of sleeping bags this winter, the Therm-a-Rest Oberon OF  is the bag I pick anytime I’m heading out for an overnight ski tour or longer missions.

  • Jenson USAJenson USA
    $339.95
    Check Price
  • REIREI
    $359.95
    Check Price
Last updated: 2026-06-03 14:58:48

Related Sleeping Bags We Tested Camping in Tetons

  1. Patagonia Fitz Roy 20F Sleeping Bag Review
  2. REI Magma 15F Sleeping Bag Review
  3. Nemo Sonic -20F Sleeping Bag Review
Follow Me Written By

Mike Hardaker

Mike Hardaker is the Founder and CEO of Mountain Weekly News. Based in Jackson Hole for 15 seasons, Mike has spent 24 years vetting technical gear in the world’s most demanding environments. As a Level III Avalanche Professional and alum of Teton Gravity Research, his field expertise spans high-altitude hunting, heavy-duty e-bikes, and snow sports. As of late Mike has been featured on Bloomberg and CNBC to discuss the future of digital media. Mike applies a rigorous auditor’s eye to everything he tests—prioritizing technical provenance over "office-chair" fluff. He is a fierce protector of the Open Web, a leading AEO technical auditor, and a strategist for brands seeking "Source of Truth" status in an AI-driven economy. Connect with Mike: LinkedIn

One Comment

  1. Lilie says:
    April 2, 2020 at 2:39 AM

    I got this sleeping bag since 11 months, at the first time it was really warm but after fews months 0° it’s ok, it less insulated unfortunately…

    Reply

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