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The Rab Neutrino 12C / 10F delivers dependable cold-weather performance with a balanced focus on warmth, comfort, and durability.
Rab says:
There are endless alpine landscapes waiting to be explored, and this is the sleeping bag to get you there. Offering outstanding warmth for weight with a robust, all-mountain design, it’s a versatile bag that easily adapts to a range of alpine pursuits, from long-distance treks to fast-moving spring ascents. We’ve strategically placed fabrics to give you maximum durability and loft where you need them, creating a hardwearing, hardworking bag that’s nonetheless super packable and lightweight. Filled with 800FP down in our groundbreaking L.O.F.T 3D™ baffle construction which eliminates cold spots, it provides the efficient warmth you need for technical pursuits on alpine terrain.
Our Verdict
The Rab Neutrino 12C / 10F is a well-rounded down sleeping bag designed for winter conditions and extended use in colder environments. At 1119g, it offers a strong balance between weight and warmth, with a slightly more forgiving cut than ultralight options, making it more comfortable for general use and side sleepers. The L.O.F.T 3D baffle construction uses a structured internal layout to keep down evenly distributed, reducing cold spots and maintaining stable insulation. Sidewall baffles increase usable internal space and help preserve loft during movement, improving comfort without sacrificing efficiency.
The TILT lining reflects radiant body heat towards you, helping retain warmth without adding bulk. A 3/4-length zip allows effective temperature regulation, making it easier to vent heat than more minimal designs.
- Reviewed by Ultralight Outdoor Gear
Features
- Weight-saving L.O.F.T 3D™ baffle technology reduces down migration, optimising heat retention and reducing pack size
- Longitudinal chest baffles for increased thermal efficiency
- Anatomically fitted hood with drawcord adjustment to maximise comfort and heat retention
- Internal cordlocks positioned below the collar bone for greater side sleeping comfort
- Sidewall baffle construction for increased down loft and greater side sleeping comfort
- 3D shaped down-filled neck collar
- 2-way YKK® 3/4 length main zip with down-filled baffle
- YKK® anti-snag zip insert and anti-snag internal zip guard
- Anatomically shaped foot box for relaxed sleeping posture
- Lightweight dry bag compression stuff sack
- Zipped storage sack with water-resistant base for home storage
- Hand-filled in Derbyshire UK
- Tapered mummy shape
- Temperature rated in accordance with ISO 23537-2:2022
Specifications
Temperature Rating
- Comfort: -5°C
- Comfort Limit: -12°C
- Extreme: -33°C
Regular
- Weight: 1119g
- Lenth: 215cm
- Width: 80cm
Regular wide
- Weight: 1187g
- Lenth: 215cm
- Width: 90cm
Long
- Weight:
- Lenth: 230cm
- Width: 80cm
Material & Construction
- 10D Pertex® Quantum ripstop (26g/m²) with fluorocarbon-free DWR
- 20D Pertex® Quantum ripstop (38gsm) with fluorocarbon-free DWR
- Lining: Recycled 20D nylon, 38g/m²
- 800FP European goose down with Grangers fluorocarbon-free hydrophobic finish (600g / 21.2oz)
- 100% Woven Polyamide Shell , Down filled sleeping bag
