Rab Mythic Ultra 0°C Sleeping Bag | Ultralight Down Bag for Fast & Light

Description

The Rab Mythic Ultra 0°C is a down sleeping bag designed for those who prioritize minimum weight, maximum thermal performance, and extreme compressibility in fast & light activities, light trekking, and high-pace mountaineering.

Featuring 900FP European goose down, L.O.F.T. 3D™ construction, and a liner with TILT technology, it offers an outstanding warmth-to-weight ratio within the premium segment. It is clearly geared towards users who count grams but do not want to sacrifice serious thermal protection for spring, alpine summer, and light bivouacs.

Real Technical Performance

Within the Rab collection, the Mythic Ultra sits above the Neutrino range in its focus on absolute lightness and advanced thermal efficiency. The L.O.F.T. 3D™ construction with helical baffles minimizes down migration and reduces cold spots, while the liner with TILT helps reflect radiant heat back to the body with virtually no added weight.

The use of 10D Pertex® Quantum ripstop on the exterior keeps the entire package incredibly light and compressible. It is not the sleeping bag for those who prioritize maximum robustness or carefree intensive use, but for those seeking a premium, technical product fine-tuned for moving fast in the mountains.

Quantitative Technical Specifications

• Weight: 500 g
• Fill: 900FP European goose down with fluorocarbon-free hydrophobic finish
• Down fill weight: 187 g
• Main outer fabric: 10D Pertex® Quantum ripstop (26 g/m²) with fluorocarbon-free DWR
• Liner: 10D Recycled Atmos™ (28 g/m²) with Thermo Ionic Lining Technology (TILT)
• Comfort temperature: 5°C
• Limit temperature: 0°C
• Extreme temperature: -15°C
• Compressed size: 16 x 30 cm
• Construction: L.O.F.T. 3D™
• Shape: Tapered mummy

Comparison within the Range

Compared to the Neutrino 0°C, this Mythic Ultra 0°C opts for an even lighter construction, higher quality down, and a clearly more premium product feel. Where the Neutrino offers more versatility and robustness for general alpine use, the Mythic Ultra pushes performance into the ultralight domain.

Within the Mythic family itself, this 0°C model is the most versatile option for mild to cool conditions. Colder Mythic Ultra models increase the thermal level for more demanding environments, while this one maintains the most interesting balance for light trekking, mountain thru-hiking, and fast bivouacking.

Recommended Use

• Light trekking and fastpacking
• Alpine bivouacs in mild to cool conditions
• Fast mountaineering in spring and summer
• Users seeking maximum performance with minimum weight

Is it for you?

Yes, if you are looking for a premium, ultralight, and very packable down sleeping bag for moving fast in the mountains.

Yes, if you highly value the warmth-to-weight ratio and want a technically very advanced product.

No, if you prioritize robustness, carefree intensive use, or better performance in continuous humidity. In that case, Neutrino or synthetic ranges might be a better fit.