The World’s First Heat-Reflective Sleeping Bag

Rab was founded in 1981 by British climber Rab Carrington. Built on decades of experience in extreme environments and alpine climbing, the brand continues to create highly reliable equipment trusted by mountain professionals around the world.

The award-winning Mythic 0°C is a pioneering sleeping bag designed for mountain marathon runners and high-end alpinists who count every gram. Developed through over 40 years of mountain experience, it stands among the world’s finest ultralight sleeping bags.

The appeal of the Mythic series extends beyond its exceptional warmth-to-weight ratio. Its neutral color palette blends naturally into the surrounding landscape, offering both technical mountain performance and a refined aesthetic. It pairs seamlessly with wanderout products, creating a beautifully cohesive outdoor environment. Designed not only for demanding mountain pursuits, it is also a sleeping bag for those who value the experience of spending time in nature itself.

The shell is constructed from ultralight yet highly durable 10D Pertex® Quantum ripstop nylon. Inside, Rab’s proprietary TILT (Thermo Ionic Lining Technology) reflects radiant body heat back toward the user through an ultra-thin titanium coating applied to the fabric fibers. This significantly improves warmth without compromising breathability, allowing the bag to achieve outstanding thermal efficiency while maintaining an exceptionally low weight.

Filled with 900FP fluorocarbon-free hydrophobic European goose down, the Mythic uses ethically sourced and fully traceable RDS (Responsible Down Standard) certified down. Rab’s proprietary L.O.F.T.™ 3D body-mapped baffle construction minimizes cold spots while maximizing thermal efficiency throughout the bag.

With a Comfort rating of 5°C and a Limit rating of 0°C, the Mythic 0°C is ideally suited to spring through autumn camping and mountain adventures in Japan. It is also an excellent choice for summer alpine trips and fast-and-light pursuits where minimizing pack weight is essential. During colder seasons, it can be layered with the Rab / Mythic Down Sleeping Bag (-6°C) to extend its performance into a wider range of conditions. By selecting the appropriate bag for the environment, users can build a versatile sleep system capable of covering a broad temperature range throughout the year.


Wanderout Journal
Rab / Mythic Ultra System


- L.O.F.T.™ 3D body-mapped baffle construction for exceptional warmth-to-weight performance
- Engineered baffle design to minimize down migration
- Tapered mummy shape
- Differential cut construction
- Bonded anti-snag zip guard
- Ergonomically designed hood and internal collar
- Angled foot box for enhanced thermal efficiency
- 1/2-length YKK® 3-coil zip
- Noctilucent zip pull for improved visibility at night
- Made in Derbyshire, UK
- Tested to EN ISO 23537-1:2022


Circumference (shoulder girth): approx. 160 cm
Pack size: approx. 30 × 16 cm
Weight: 500g

Temperature ratings (EN/ISO):
Comfort 5°C, Limit 0°C, Extreme - 15°C

Material : 
- Shell :  Pertex® Quantum 10D ripstop nylon (26gsm) with fluorocarbon-free DWR finish
- Lining :  Atmos™ 10D recycled nylon (28gsm) with TILT (Thermo Ionic Lining Technology)
- Insulation :  900FP European goose down with fluorocarbon-free hydrophobic treatment (187g)
Includes :  1 storage sack, 1 lightweight dry compression sack

Country of origin: United Kingdom



Product code 09965-53-002