The Neutrino -12C / 10F by Rab is the ideal men's sleeping bag for your high-altitude adventures. Designed with L.O.F.T 3D™ technology, it offers exceptional warmth while being lightweight and compressible. With its long baffles and 3D down collar, it minimizes cold spots and maximizes thermal efficiency. Its Pertex® Quantum ripstop fabric, water-repellent and fluorocarbon-free, ensures durability in the most demanding alpine conditions.
The comfort is at the heart of the Neutrino's design. Its anatomical hood and profiled foot box provide a restful night's sleep, even when temperatures drop. Strategically placed internal drawcords ensure an optimal fit, especially for side sleepers. The YKK® two-way zipper features a snag-free guard, for easy and stress-free access.
Perfect for mountaineering enthusiasts and demanding hikers, this sleeping bag is a companion of choice to face cold mountain nights. Hand-filled in the UK, it combines craftsmanship and technology to offer you an unforgettable experience in the great outdoors.
The L.O.F.T 3D™ baffle technology allows for weight savings by reducing down migration, optimizing heat retention, and decreasing pack size.
Longitudinal chest baffles for increased thermal efficiency
Anatomical hood with drawcord for optimal comfort and heat retention
Internal drawcords positioned under the collarbone offer greater comfort when lying on the side.
Side baffle construction for increased down loft and superior side-sleeping comfort
3D-shaped down collar
Main YKK® two-way 3/4 length zip with down-filled baffle
YKK® snag-free zip insert and internal snag-free zip guard
Anatomically shaped foot box for a relaxed sleeping posture
Lightweight waterproof compression stuff sack
Zipped storage sack with water-resistant base for home storage
Hand-filled in Derbyshire, UK
Tapered mummy shape
Temperature rating in accordance with ISO 23537-2:2022
Pertex® Quantum 10D (26 g/m²) ripstop fabric with durable fluorocarbon-free water repellent finish
Pertex® Quantum 20D (38 g/m²) ripstop fabric with durable fluorocarbon-free water repellent finish
Lining: Recycled 20D nylon, 38 g/m²
European goose down 800FP with fluorocarbon-free hydrophobic finish by Grangers (600 g / 21.2 oz)
100% woven polyamide shell, down-filled sleeping bag
Weight: 1070 g

Nature is our playground and our commitment to the environment is obvious. This is also why we highlight our selection from HardGreen, which makes sustainable, eco-friendly products that help
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Made from old clothing, plastic bottles or fishing nets, products bearing this label contain at least 20% recycled materials. This saves water and energy, as well as raw materials, thus reducing the environmental footprint.
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