Rab Neutrino -12°C Sleeping Bag | Down Bag for Alpinism and Mountaineering

Description

The Rab Neutrino -12°C is a high-performance down sleeping bag designed to offer an excellent ratio of warmth, weight, and compressibility for mountain activities where every gram counts.

With 800FP European goose down, L.O.F.T 3D™ construction, and strategically placed Pertex® Quantum fabrics, it is an ideal choice for alpine trekking, technical bivouacking, and ascents in cold conditions where serious insulation is needed without inflating backpack volume.

Real technical performance

Within the Neutrino family, this unisex model is designed for cold, 3-4 season outings and winter mountaineering, where the balance between thermal protection and lightness is decisive.

The L.O.F.T 3D™ construction helps reduce down migration and improves thermal efficiency, while the combination of 20D Pertex® Quantum on the base and footbox and 10D Pertex® Quantum on the top allows for increased durability in the most exposed areas without sacrificing overall compressibility and lightness.

The specific patterning and mummy shape help optimize heat retention, while the thermal collar, anatomical hood, and zipper baffle limit temperature loss on truly cold nights.

Technical specifications

• Weight: 1070 g
• Fill: 800FP European goose down with fluorocarbon-free hydrophobic finish
• Down fill weight: 600 g
• Main outer fabric: 10D Pertex® Quantum ripstop (26 g/m²) with fluorocarbon-free DWR
• Secondary outer fabric: 20D Pertex® Quantum ripstop (38 g/m²) with fluorocarbon-free DWR
• Lining: 20D recycled nylon, 38 g/m²
• Comfort temperature: -5°C
• Limit temperature: -12°C
• Extreme temperature: -33°C
• Compressed size: 20 x 35 cm
• Construction: L.O.F.T 3D™
• Shape: Mummy taper fit

Comparison within the range

The Neutrino 0°C is aimed at milder trips and alpine summer use. The Neutrino -6°C expands versatility for cold spring, high altitudes, and alpine trekking. This Neutrino -12°C clearly raises the thermal level and is positioned for cold conditions, serious bivouacs, and lightweight winter mountaineering, while maintaining a still-reasonable format in weight and volume.

Compared to the Mythic range, the Neutrino prioritizes a slightly more robust and versatile offering. Compared to the Alpine or Ascent range, it offers a more technical construction, better warmth-to-weight ratio, and a more clearly alpine focus.

You can also compare: Rab Neutrino -18°C Sleeping Bag · Rab Neutrino -6C / 20F Sleeping Bag · Rab Neutrino range.

Recommended use

• Alpinism and winter mountaineering
• Alpine trekking in cold conditions
• Technical 3-4 season bivouac
• Ascents where weight and volume matter

Is it for you?

Yes, if you are looking for a technical down sleeping bag with a very good ratio of warmth, weight, and compressibility.

Yes, if you practice cold-weather mountaineering, alpine bivouacking, or demanding trekking and need a more serious model than a transitional sleeping bag.

No, if your main use will be summer or mountain huts. In that case, the milder Neutrino models or ranges more oriented toward general trekking will be a better fit.