The Rab Mythic (0°C) is an ultralight, high-performance sleeping bag engineered for fast-moving spring alpine missions and technical mountain terrain. Designed with a relentless focus on minimising weight and bulk, it delivers exceptional warmth-for-weight performance for climbers, fastpackers, and alpinists operating in demanding conditions.
Filled with premium 900 fill power down, the Mythic uses advanced L.O.F.T 3D™ helix-shaped baffle construction to eliminate cold spots and maintain even insulation distribution. These engineered funnel-shaped baffles prevent down migration, ensuring consistent warmth while keeping weight and packed size to an absolute minimum.
A key feature is the integrated TILT (Thermo Ionic Lining Technology), which reflects radiant body heat back towards the sleeper, significantly improving thermal efficiency without adding bulk. The outer shell is constructed from lightweight Pertex® Quantum ripstop fabric, providing durability and wind resistance for alpine environments. Hand-filled in the UK, the down has never been pre-compressed, preserving maximum loft and long-term insulating performance. Built for speed and efficiency, the Mythic (0°C) is ideal for fast-moving spring and summer alpine objectives.
FEATURES:
- Pioneering L.O.F.T 3D™ construction features helix-shaped baffles that prevent down migration and maximise warmth retention.
- Built with a heat-reflective TILT lining, minimising radiant heat loss for virtually no extra weight.
- Sleep comfortably on your side thanks to the sidewall baffles, which reduce cold spots and ensure you’re not lying on a seam.
- Cinch in the hood to seal in the heat, with cordlocks positioned away from your face for comfort.
- The tapered mummy shape is incredibly efficient on pack size.
- We’ve used a 1/8 length zip to keep weight to an absolute minimum, with a down-filled zip baffle to eliminate cold spots.
- Anatomically shaped foot box allows you to sleep in a relaxed position.
- Lightweight dry bag compression stuff sack.
- Zipped storage sack with water-resistant base for home storage.
- Hand-filled in Derbyshire UK.
SPECIFICATIONS:
Weight: 500g/1lb 1.64oz
Insulation: 900FP European goose down with Grangers fluorocarbon-free hydrophobic finish (187g / 6.6oz)
Main fabric: 10D Pertex® Quantum ripstop (26g/m²) with fluorocarbon-free DWR
Fabric lining: 10D Recycled Atmos™ (28gsm) with Thermo Ionic Lining Technology (TILT)
ISO (23537-1:2022) temperature rating: Comfort: 5°C (41°F), Limit of comfort: 0°C (32°F) , Extreme: -15°C (5°F)
Limit of Comfort: 0°C / 32°F
Packed size: 16cm x 30cm (6.3in x 11.8in)
Product code: QSN-24