Rab Neutrino 0C / 32F Sleeping Bag | Lightweight Down Sleeping Bag for Alpine Trekking

Description

The Rab Neutrino 0C / 32F is a lightweight, highly compressible down sleeping bag designed for summer mountain use, alpine trekking, and thru-hikes where weight and packed size make the difference. Within the Neutrino family, it serves as the entry point to a distinctly technical product, intended for those who want maximum warmth-to-weight efficiency without carrying an oversized bag.

Its 800FP European goose down fill, L.O.F.T. 3D™ construction, and the combined use of Pertex® Quantum and Pertex® Quantum Pro fabrics create a very lightweight, packable bag perfectly suited for three-season mountain trips in mild to cool conditions.

Real technical performance

The Neutrino 0C is designed for moving fast and sleeping efficiently at altitude during spring, summer, and early autumn. The L.O.F.T. 3D™ construction uses helical baffles that reduce down migration and minimize cold spots, while longitudinal baffles in the torso improve thermal retention in the core area.

Rab reinforces the base and footbox with 20D Pertex® Quantum Pro, providing greater durability and better resistance to moisture and abrasion in the most exposed areas. On the upper section, 10D Pertex® Quantum prioritizes loft, lightness, and compressibility. The result is a bag clearly oriented toward real technical performance in the mountains, rather than generic camping.

Quantitative technical specifications

• Weight: 700 g / 1 lb 8.69 oz
• Fill: 800FP European goose down with Grangers fluorocarbon-free hydrophobic finish (200 g / 7.1 oz)
• Main fabric: 10D Pertex® Quantum ripstop nylon (26 g/m²) with fluorocarbon-free DWR
• Secondary fabric: 20D Pertex® Quantum ripstop nylon (38 g/m²) with fluorocarbon-free DWR
• Lining: Recycled 20D nylon, 38 g/m²
• Comfort temperature: 5°C / 41°F
• Limit temperature: 0°C / 32°F
• Extreme temperature: -15°C / 5°F
• Packed size: 16 cm x 30 cm (6.3 in x 11.8 in)
• Product code: QSN-15

Comparison within the range

Compared to the Neutrino -6C, this model reduces weight and volume to offer a faster and lighter option in less cold conditions. Compared to the Mythic Ultra 0C, it maintains a slightly more robust and versatile profile, with a very solid balance between technicality, durability, and compressibility.

Compared to a synthetic bag like the Radeon 0C, the Neutrino 0C offers a better warmth-to-weight ratio and takes up less space in the pack, making it a better fit for alpine trekking and trips where every gram counts. In exchange, it requires a bit more care in persistently damp environments.

Recommended use

• Alpine trekking, hut-to-hut traverses, and lightweight bivy
• Three-season mountain use in mild to cool conditions
• Summer ascents where weight and volume are priority
• Users looking for a technical and versatile down bag for non-winter high mountain use

Is it for you?

Yes, if you are looking for a lightweight, technical down bag for alpine trekking, bivy, and three-season mountain trips. Yes, if you prioritize compressibility and low weight over bulkier solutions. No, if your primary use will be wet camping or highly variable conditions where a synthetic bag offers more peace of mind. No, if you need a significantly higher thermal reserve for truly cold nights; in that case, it is better to upgrade to the Neutrino -6C or -12C.