Mythic Ultra 180 Sleeping Bag: 32F Down

40% OFF

$526.50

$877.50Save $351.00 (40%)

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Price Historylast 2 months

Low $526.50 · High $614.25. Hover the line to see each change.

Is this a good deal?

The current price has held for 15 days.
Across the 37 Sleeping Gear deals we’re tracking right now, the median discount is 36% — this deal’s 40% off is right around that mark.

Based on prices we’ve recorded from Backcountry since May 2026, refreshed several times daily.

About this product

The Rab Mythic Ultra 180 is a mummy-style sleeping bag rated to 0 degrees Celsius (32 degrees Fahrenheit), built for ultralight three-season backpacking. At a packed weight of just 397 grams (approximately 14 oz), it stays well under a pound without compromising warmth or durability. The fill is 900-fill-power RDS certified European goose down, one of the higher fill powers available in consumer sleeping bags, delivering strong warmth-to-weight performance. The shell uses 7D ripstop nylon to keep the overall weight minimal while maintaining reasonable resistance to wear. A mummy cut fits close to the body for heat retention while still allowing comfortable movement during sleep. The YKK zipper features an anti-snag bonded zip guard for smooth, reliable operation. The bag packs into a dry bag compression stuff sack measuring roughly 12.6 by 6.3 inches, and a cotton storage sack is included to keep the down lofted during long-term storage. A lifetime warranty is included.

Category: Sleeping Gear
Brand: Rab

What people are saying

Reviewers consistently praise the Rab Mythic Ultra 180 for its exceptional warmth-to-weight ratio, with the bag weighing under 400g while delivering impressive insulation. The standout feature across reviews is the proprietary TILT (Thermo Ionic Lining Technology), a titanium coating that reflects heat back to the sleeper, described as a genuine performance leap over comparable ultralight bags. The hydrophobic 900+ fill-power down, trapezoidal baffles to prevent cold spots, and extremely compact pack size are also frequently highlighted. The most common criticisms center on the very short one-eighth-length zip, which limits ventilation on warmer nights and draws comparisons to more versatile half-zip competitors. Cold sleepers are cautioned that the 180 sits right at its comfort limit around freezing temperatures, and reviewers note that layering or a high-R-value sleeping pad is advisable. The premium price is also flagged as a significant barrier.