Thermarest Ohm 20F/-6C

Availabilty: In stock
Only %1 left
As low as €427.46 Regular Price €474.95
Including 21% V.A.T.
More Information
Insulation Down
Comfort temperature -10° / 0°
Weight 500 - 750g

Quick overview

When you need ultralight weight and packability, but can’t go without warmth and comfort, the Thermarest Ohm 20F/-6C is hard to beat. Weighing in at just 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.


  • 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

Thermarest Ohm 20F/-6C R L
Comfort °C 0 °C
Limit °C -6 °C
Extreme °C X
Fill weight (grams) 355 387
Weight (grams) 635 720
Insulation material 900-Fill Nikwax Hydrophobic Down™, RDS
Up to bodysize (cm) 183 196
Girth @ shoulder / hip / foot (cm) 157 / 142 / 89 168 / 150 / 97
Packed dimensions (cm) 17x20
Intended use Fast & Light 

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