Mythic Ultra 120 Modular Left Zip Sleeping Bag - Regular

39% OFF

$365.00

$599.99Save $234.99 (39%)

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Price Historylast 14 days

Low $365.00 · High $389.99. Hover the line to see each change.

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Across the 26 Sleeping Gear deals we’re tracking right now, the median discount is 37% — this deal’s 39% off is right around that mark.

Based on prices we’ve recorded from The Last Hunt since August 2026, refreshed several times daily.

About this product

The Rab Mythic Ultra 120 Modular Left Zip Sleeping Bag in Cloud/Graphene is a regular-length, ultralight sleeping bag built around 900-fill-power down and a 100% woven nylon shell, filled in Derbyshire, United Kingdom. It carries a 0 degrees Celsius sleep limit rating when paired with an air mat rated R4 or above, making it a capable three-season option for thru-hikers and multi-day mountain runners. The insulation uses a stitch-through construction concentrated in the upper bag and lower legs to maximize warmth-to-weight performance, with the packed weight coming in at just 458 grams. A diagonal YKK 2-way zip on the left side allows straightforward entry and exit as well as flexible venting, and a down-filled anti-snag baffle runs the length of the zip. An integrated mat sleeve secures the uninsulated section of the bag to a compatible air mat, while a pillow sleeve accommodates folded clothing. A lightweight roll-top compression sack is included for packing down.

Category: Sleeping Gear
Brand: Rab
Material: 100% Woven Nylon Shell, Down filled sleeping bag
Color: Colour: Cloud - Graphene
Weight: 0.458
Country Of Origin: United Kingdom

What people are saying

Reviewers consistently praise the Rab Mythic Ultra 120 for its extraordinary warmth-to-weight ratio, with the bag weighing around 330g and packing down to roughly the size of a grapefruit. The 900-fill-power down combined with the TILT reflective lining earns repeated credit for delivering more warmth than its minimal weight suggests, and the soft, breathable nylon interior is well regarded. The modular design, which eliminates insulation on the underside to save weight, is seen as clever and logical when paired with a quality sleeping pad. The most common criticisms center on the snug mummy fit, which can feel restrictive for restless sleepers, and the bag being difficult to get into. Some reviewers also question whether the 0 degrees C temperature rating holds up in real-world conditions, with at least one tester finding warmth fell short at temperatures as mild as 5 degrees C. Compatibility with non-Rab sleeping pads in the sleeve system is noted as a limitation.