Mythic Ultra 120 Modular Down Sleeping Bag (0C)
Slash weight from your kit list with this award-winning ultralight modular bag, designed for thru-hiking, bikepacking, and mountain running.
Performance
Activities
We recommend using this for:
- Fast & light adventures
- Mountaineering
- Trekking
Designed as the perfect complement to the new Ultrasphere 4.5 sleep mat, yet versatile enough to be used with other inflatable mats, the award-winning Mythic Ultra 120 Modular cuts weight and bulk by only including insulation where it’s not already provided by your mat. The upper bag, and underside of the legs, is filled with ultra-high-lofting 900FP down and heat-reflective TILT, reducing radiant heat loss without a gram of unnecessary weight. Meanwhile, the lower bag hooks around the mat which insulates you from the ground.
The result is an ultralight bag that, when combined with the Ultrasphere 4.5, forms a sleep system that weighs under 700g yet allows you to sleep comfortably down to 0°C. With a tiny pack size and uncompromised comfort, it’s the perfect sleeping bag for long-distance trekking, bikepacking, and multi-day mountain runs.
The lightweight stitch-through construction is low-bulk, with the down strategically positioned to optimise warmth. Secure the bag onto your sleep mat using the back harness, while the insulated side baffles marry up to the side of the mat to keep cold spots at bay. We’ve chosen a diagonal zip to allow easy entry and exit, as well as plenty of ventilation on warmer summer nights. Stash clothing in the hood sleeve to create an ultralight pillow, further streamlining your kit list.
The Mythic Ultra 120 Modular is hand-filled in the UK to ensure that its down has never been compressed before use, retaining its loft for your first epic adventure.
Due to its construction, this bag does not meet the criteria for an EN test. Our sleep limits are based on our many years of experience, supplementary testing, and athlete and test team feedback. Head over to Rab Lab to find out more about the Rab Sleep Limit.
Get stuck into the detail
Want to learn more about the details that set this gear apart? Hear about the tech, fabrics, and features from the team behind the design.
Play Video- Weight:330g/11.6oz
- Insulation:900FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (120g/4.2oz)
- Main fabric:10D Recycled Atmos™ (27gsm) with Fluorocarbon-Free DWR
- Fabric lining:10D Recycled Atmos™ (28gsm) with Thermo Ionic Lining Technology (TILT)
- Rab sleep limit:0°C / 32°F with air mats rating R4 or above
- Packed size:32cm x 16cm (12.6in x 6.3in)
- Product Code:QSI-40
- TILT and 900FP down on upper bag and lower legs achieves high warmth to weight ratio
- Integrated mat sleeve secures uninsulated area of the bag to air mat
- Rab sleep limit of 0°C (32°F) achieved with air mats rating R4 or above
- diagonal zip entry with YKK® 2-way zip allows easy entry and exit, and versatile venting
- Pillow sleeve designed for folded clothing for use as a ultralight pillow
- Down-filled anti-snag zip baffle
- Lightweight roll-top compression sack included
- Filled in Derbyshire UK
- Optimally filled, lightweight stitch-through construction
Sleeping Bag Size Guide
| Tapered Mummy | Regular |
|---|---|
| Sleeping bag length | 215cm / 84.6in |
| Max user height | 185cm / 72.8in |
| Internal shoulder girth | 160cm / 63.0in |
| Internal hip girth | 134cm / 52.8in |
| Internal foot girth | 102cm / 40.2in |
| Pack size | 32cm x 16cm |
Material facts
Sustainability. It’s complicated. We’re helping you to make informed choices by giving you the raw data. Clear. Concise. Honest. We pledge to be transparent, showing you how our products are made, from which materials and where. Learn More
Material Facts
Mythic Ultra 120 Modular Down Sleeping Bag (0C)
| Recycled | PFAS i
|
|
|---|---|---|
|
Total recycled content* i
|
57% | No |
|
Fabric i
|
98% | No |
| Outer | 100% | No |
| Liner | 96% | No |
| Liner Yarns | 0% | |
| Liner Coatings | 0% | |
| Hydrophobic Down | 0% | No |
|
Zips i
|
29% | No |
|
Trims i
|
2% | No |
| Renewable Energy | ||
| Product Manufacturing | 64% | |
| Manufactured in United Kingdom | ||
| *Calculations based upon the weight of a regular length sleeping bag. | ||
Similar gear to consider
Atmos™ Recycled
Made using super-fine yarns in a tight construction, recycled Atmos™ is durable and packable. Windproof, fast-drying, and highly water-resistant, it protects against the weather on mountain adventures.
Atmos™ Recycled
Made using super-fine yarns in a tight construction, recycled Atmos™ is durable and packable. Windproof, fast-drying, and highly water-resistant, it protects against the weather on mountain adventures.
What is TILT technology?
A radical, heat retaining tech that works like an emergency blanket reflecting heat back towards your body, while maintaining breathability and comfort. Boosting thermal efficiency, it keeps you warm when the temperature plummets.
What is TILT technology?
A radical, heat retaining tech that works like an emergency blanket reflecting heat back towards your body, while maintaining breathability and comfort. Boosting thermal efficiency, it keeps you warm when the temperature plummets.