Rab Mythic -12 °C – Down Sleeping Bag

Product detailed description

The Rab Mythic -12 °C down sleeping bag is an updated model from the new line of high-tech down sleeping bags featuring TILT technology Rab Mythic. This is an improved version of the Rab Mythic 600.

Rab is down 

It has been over 50 years since Rab Carrington gained his first experience sewing down sleeping bags in Buenos Aires, Argentina. And it has been 45 years (2026) since the first sleeping bag under the  Rab brand saw the light of day. Even in his very first model, Carrington incorporated his extensive experience from mountain climbs. Thanks in part to his good reputation within the close-knit climbing community, demand for his sleeping bags began to grow relatively quickly. 

The goal was to create high-quality, lightweight, and warm sleeping bags that would perform well in the mountains. At the same time, he stuck to his motto:

“Nothing fancy or overly technical—just honest, functional pieces that you’d rather repair than replace. By climbers, for climbers”.

And we at Nalehko are very happy, that Rab is continuing in this direction even in the 21st century. Simply put, these are products you can 100% rely on while trekking, and they won’t let you down even in the most demanding conditions. During our own adventures we’ve used countless models from this iconic British brand, and we’ve always been completely satisfied.

And that is precisely why, just like the other products in our range, we are delighted to offer them to you, our customers.

You can read the full story of Rab Carrington and the Rab Equipment brand here.

Rab Mythic -12 °C

The Rab Mythic series of sleeping bags is designed with a focus on maximizing weight and volume reduction. Specifically, the Rab Mythic -12 °C weighs a mere 920 grams (size Regular).

Construction

The main innovation is the use of the revolutionary L.O.F.T 3D™ chamber construction. These are offset, spiral-shaped baffles that prevent down migration, keep it evenly distributed, and maximize heat retention. At the same time, they enable top-notch insulation properties with a smaller volume and lighter weight of the sleeping bag. Special side baffles eliminate cold spots and ensure that when sleeping on your side you won’t be lying on a seam.

Heat loss is also prevented by the well-designed drawstring 3D down collar combined with an anatomically shaped drawstring hood.

The sleeping bag has a "wide" mummy shape with an anatomically shaped "foot box". A generous cut for greater sleeping comfort with room for leg movement.

Thermo Ionic Lining Technology - TILT

This is a special technology developed by Rabu. In addition to sleeping bags, you can also find it in the top-of-the-line jackets from the series of the same name, namely Mythic Ultra and Mythic G.

Individual fabric fibers are coated with an extremely thin layer of  titanium, which helps reflect the user’s radiated heat back to the body, thereby reducing heat loss by up to 30% without compromising the fabric’s breathability or adding a single gram to the sleeping bag’s total weight.

Materials

Rabu has opted for the proven Pertex® Quantum. A lightweight, breathable, windproof material tested over countless nights.  The sleeping bag’s lining is now 10D Recycled Atmos™ featuring the aforementioned TILT technology. As is typical for Rab, it includes a DWR water-repellent finish fluorocarbon-free.

The zipper used is a lightweight YKK® with a down-insulated barrier.

Top-quality down 

And finally, the most important part. The Rab Mythic -12 °C is filled with 590 grams of premium European goose down with a fill power of 900FP (size Regular). This ranks it among the reliable three-season sleeping bags. Grangers hydrophobic treatment (fluorocarbon-free, of course) combined with the outer fabric’s DWR coating provides solid water resistance for the entire sleeping bag. 

The down traditionally comes with a certificate of origin R.D.S.  All Rab sleeping bags are hand-filled in Derbyshire, UK. Rab also guarantees that its down has never been compressed prior to use, thereby retaining its loft and resilience.

Temperature Limits

Temperature limits according to ISO 23537-2:2022 are: Comfort: -5 °C, Limit: -12 °C, Extreme: -33 °C.

Of course, this should be taken with a grain of salt.  We are all different, so the temperatures listed should be viewed more as a guide for choosing the right sleeping bag. The standard is based on the parameters of an average man— 25 years old, 173 cm, 73 kg  and a standard woman—25 years old, 160 cm, and 60 kg.

The temperatures listed represent a range derived from a series of measurements, starting from the upper temperature limit at which a person is able to sleep throughout the night without waking up and extending to the extreme temperature that determines the minimum temperature at which a person can survive.

A lot also depends on using a high-quality sleeping pad.  Thermal comfort can also be increased with a sleeping bag liner.

P.S.: Of course, you’ll receive an ultralight compression bag for travel, as well as a zippered storage bag with a waterproof bottom for home storage.

We also offer a summer version Rab Mythic 0 °C and a three-season version  Rab Mythic -6 °C. 

Rab Mythic -12 °C:

• Thermo Ionic Lining Technology (TILT).
• L.O.F.T 3D™ chamber technology reduces down migration, increases thermal efficiency, and minimizes pack volume.
• Anatomically shaped hood with drawcord for maximum protection and heat retention.
• Internal loops located under the collarbone for greater comfort when sleeping on your side.
• Side-chamber construction for higher loft and comfort when sleeping on your side.
• 3D anatomically shaped insulated collar around the neck.
• YKK® two-way main zipper.
• Anatomically shaped foot section for a natural and relaxed sleeping position.
• Ultra-lightweight compression stuff sack.
• Zippered storage bag with a water-resistant bottom for home storage.
• Hand-filled in Derbyshire, UK.
• Mummy cut for maximum thermal efficiency.

Technical Specifications:

• Weight: 920 g (size Regular).
• Temperature limits according to ISO (23537-2:2022):
• Comfort: -5 °C, Limit: -12 °C, Extreme: -33 °C.
• Packed dimensions: 20 cm x 35 cm.
• Regular size suitable for heights up to 185 cm / Long size for heights up to 200 cm. 

Materials:

• 590 grams (size Regular) of European goose down with a fill power of 900FP and Grangers hydrophobic fluorocarbon-free treatment.
• 10D Pertex® Quantum ripstop (26 g/m²) with fluorocarbon-free DWR treatment.
• 10D Recycled Atmos™ (28 g/m²) with thermo-ionic lining technology (TILT).