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Mythic Ultra 360 Sleeping Bag


With its world-first heat-reflective Thermo Ionic Lining Technology, the Mythic Ultra 360 delivers pioneering protection for those who need to make every gram count.

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Weight : 606g / 21.3oz
Rab Sleep Limit : -8C / 17.6F

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What is TILT?
Qu’est-ce que le traitement TILT ?
Was ist 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.
La doublure intérieure comprend la technologie Thermo Ionic Lining (TILT) qui réduit les pertes de chaleur radiative tout en réfléchissant la chaleur pour la renvoyer en direction du corps, ce qui permet d’offrir des niveaux de chaleur plus élevés. Cela augmente le ratio chaleur/poids du Mythic Ultra de façon spectaculaire, sans changer les propriétés de son tissu original, ni augmenter son poids.
Das Innenfutter mit Thermo-Ionen-Futtertechnologie (Thermo Ionic Lining Technology – TILT) reduziert den Strahlungswärmeverlust, indem sie die Wärmestrahlung zurück in den Schlafsack reflektiert. So wird für wohlige Wärme gesorgt. Dies optimiert das Wärme-Gewicht-Verhältnis, ohne die ursprünglichen Eigenschaften des Gewebes oder das Gewicht des Schlafsacks zu beeinträchtigen.


With its world-first heat-reflective Thermo Ionic Lining Technology, the Mythic Ultra 360 delivers pioneering protection for those who need to make every gram count.

For mountain marathon runners and high-end alpinists who need to travel light, the Mythic Ultra 360 is a game changer. Built from ultra-lightweight 7D ripstop nylon, it uses Thermo Ionic Lining Technology (TILT) to coat the fibres with titanium, helping reflect the user’s radiant heat back into the bag without compromising the fabric’s breathability. While that reduces the amount of down required for a given level of warmth, the angles of the bag’s trapezoidal boxwall construction also improve the evenness of down distribution, eliminating cold spots.

Made in the UK with 900 fill power R.D.S. Certified European goose down, a weight of just 606g ensures the Mythic Ultra 360 provides one of the most efficient warmth-to-weight ratios in the world.

Key Specs

  • Weight:606g / 21.3oz
  • Temperature:Comfort; -2°C ( 28°F), Limit; -8°C ( 18°F), Extreme; -27°C ( -17°F)
  • Product Code:QSI-35


  • Super lightweight 7D Ripstop Nylon Outer Fabric
  • Super lightweight 7D ripstop nylon with thermo ionic lining technology (TILT), heat reflecting to boost warmth
  • 900+FP R.D.S Certified European Goose Down
  • Rab® Flourocarbon free Hydrophobic Down developed in conjunction with Nikwax®
  • 606g / 21.3oz saving baffle construction, preventing down shift/migration
  • Trapezoidal chamber design to eliminate cold spots
  • Proportionally designed differential cut
  • Anti snag bonded zip guard
  • Ergonomically designed internal collar and hood
  • Angled foot box
  • ½ length YKK® 3 coil main zip with noctilucent puller
  • Lightweight Dry bag compression stuff sack
  • Cotton storage sack
  • Filled in Derbyshire UK
  • Left zip only
  • Temperature tested to new European standard: EN1357:2016


Rab ships throughout Norway via FedEx but we may also use other, local delivery services that operate to the remote areas of Norway. Shipping is free over NOK1,250 else a flat rate of KR 100 will be charged per order. We aim to have your order delivered within 6 working days (although deliveries to less accessible areas of Norway may take longer)

For more information regarding shipping, including shipping charges and estimated delivery times, please visit our help centre.


If you are unhappy with your purchase, please return it to us within 28 days of receipt. The item(s) must be in resalable condition with tags attached. We are currently unable to exchange items and will refund products returned to us under the policy above.

Please note, we are not able to accept returns for underwear unless the product is faulty or damaged. We advise that you use a recorded courier service to return your item(s) as we cannot be responsible for items lost in the post.

For more information regarding returns and warranty, please see our help centre.

Mythic Ultra 360 Sleeping Bag Reviews