Mythic Ultra 360

$539.96 - $554.96
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900+ Nikwax Hydrophobic Down for outstanding warmth to weight; 20° F

With a category-redefining warmth-to-weight ratio, the Mythic Ultra series pushes the limits of what is possible. Filled in the UK with 900+ fill Nikwax Hydrophobic Down, the Mythic Ultra 360 is extremely compressible and perfect for fast-paced alpine adventures.

To this day, Rab hand-fills all of their down sleeping bags at their factory in Derbyshire, UK. This allows for outstanding quality control and a consistently excellent finished product.


WARNING for California customers: This product can expose you to chemicals including dimethylformamide, which is known to the State of California to cause cancer. For more information, go to


Brand Name:
Temp Rating:
20° F
Seasonal Usage:
Three Season
Bag Style:
Temp Rating Celsius:
-7° C
900+ fill power RDS-certified European goose down; Nikwax Hydrophobic
Fill Weight:
360g / 12.6 oz
21.3 oz / 606 g
Bag Length:
fits users up to 185 cm / 72.8 in
Circumference at Chest:
70 cm / 27.5 in (diameter)
Circumference at Hips:
52 cm / 20.5 in (diameter)
Circumference at Foot:
41 cm / 16 in (diameter)
Bag Shell Material:
Nylon ripstop
Bag Lining Material:
Titanium coated nylon ripstop
Mfg Sku/Part Number:
Other Features:
• Super-lightweight 7D ripstop nylon outer fabric
• Super-lightweight 7D ripstop nylon with thermo ionic lining technology (TILT); heat-reflecting to boost warmth
• 900+ fill power Responsible Down Standard-certified European goose down
• Rab Fluorocarbon-free Hydrophobic Down developed in conjunction with Nikwax®
• Weight-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
• 1/2 length YKK® 3-coil main zip with glow-in-the-dark puller
• Lightweight dry bag compression stuff sack included
• Cotton storage sack included
• Temperature tested to new European standard EN13537:2016

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