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BEYOND ALL LIMITATIONS
The Mythic Ultra redefines what it means to be ultralight. Using a world-first, heat-reflective fabric treatment, this is pioneering protection for those who need to make every gram count.
Cutting-Edge Technology
Thermo Ionic Lining Technology (TILT) reduces radiative heat loss by reflecting heat back towards the body, resulting in increased levels of warmth.
Premium Down Insulation
Made in Derbyshire, the Mythic Ultra is filled with 900 Fill Power R.D.S Certified Hydrophobic European Goose Down to maximise warmth while minimising weight.
Locked In Warmth
A trapezoidal chamber design eliminates cold spots, while weight-saving baffle construction prevents down migration between these chambers.
Cutting-Edge Technology
Thermo Ionic Lining Technology (TILT) reduces radiative heat loss by reflecting heat back towards the body, resulting in increased levels of warmth.
Premium Down Insulation
Made in Derbyshire, the Mythic Ultra is filled with 900 Fill Power R.D.S Certified Hydrophobic European Goose Down to maximise warmth while minimising weight.
Locked In Warmth
A trapezoidal chamber design eliminates cold spots, while weight-saving baffle construction prevents down migration between these chambers.
Revolutionising sleep systems, the Mythic Ultra redefines what it means to be ultralight. Combining cutting-edge technologies with world-class fabrics, this is premium protection for those who need to make every gram count.

Continuing to build on years of experience, the Mythic Ultra is the culmination of all our knowledge and experience. Made in Derbyshire, it has an exceptionally light but durable ripstop 7D outer that allows the 900+ FP R.D.S Certified Hydrophobic European Goose Down to fully loft, maximising warmth.

The construction of the Mythic Ultra enhances this ratio through the use of trapezoidal chambers and a weight saving baffle construction that prevents down migration. Features are up to expedition standard with an ergonomically designed internal collar and hood; YKK® zip with anti-snag zip guard; and angled foot box.

What is TILT?
The inner lining uses Thermo Ionic Lining Technology (TILT) which reduces radiative heat loss by reflecting heat back towards the body resulting in increased levels of warmth. This dramatically increases the Mythic Ultra’s warmth-to-weight ratio without changing the original fabric’s properties or increasing weight.
Rab uses ethical, responsibly sourced down from Europe.
We are masters of insulation.
Every sleeping bag hand-filled in Derbyshire.
Mythic Ultra in detail
Mythic Ultra 180
Design
  • - Filled with fluorocarbon-free hydrophobic European goose down
  • - 1/8 length YKK® zip - left side only
  • - Filled in Derbyshire, UK
  • - Weight: 400g / 14.1oz
  • Temperature Limits
  • - Rab Sleep Limit: 0C
  • Awards
  • - ISPO OUTDOOR 2019: OUTSTANDING GOLD AWARD WINNER

  • Mythic Ultra 360
    Design
  • - Filled with fluorocarbon-free hydrophobic 900FP European goose down
  • - 1/2 length YKK® zip
  • - Filled in Derbyshire, UK
  • - Weight: 606g / 21.3oz
  • Temperature Limits
  • - Rab Sleep Limit: -8C