Rab Neutrino -18C / 0F

The Rab Neutrino -18 is the definitive choice for ambitious mountaineers and cold-weather trekkers seeking high-performance protection without a weight penalty. Designed for rugged alpine environments, this bag features a strategic blend of fabrics to balance durability and packability. The base and footbox utilize a robust 20D Pertex® Quantum fabric to withstand contact with rough ground, while the top section uses an ultra-light 10D Pertex® Quantum. This allows the insulation to loft fully for maximum thermal efficiency, ensuring this tapered mummy bag remains incredibly packable during multi-day winter expeditions.

Delivering exceptional warmth for technical pursuits, the Neutrino -18 is hand-filled in Derbyshire with premium 800FP European Goose Down. This down is treated with a fluorocarbon-free hydrophobic finish, maintaining its critical loft even in damp conditions. Rab employs their pioneering L.O.F.T 3D™ construction, featuring helix-shaped baffles that eliminate cold spots and prevent down migration. With an ISO limit of -18°C (0°F), it provides the serious heat retention required for high-altitude bivouacs. Because the down is never compressed before use, you receive a bag with unparalleled thermal integrity.

Every detail is optimized for comfort and functionality in technical terrain. Longitudinal chest baffles efficiently trap heat around the core, while specific sidewall baffles and an anatomical footbox cater to side sleepers. The two-way YKK® anti-snag zip allows for easy ventilation and is backed by an insulated baffle to seal out drafts. Practical additions like internal cordlocks and a down-filled neck collar further enhance heat retention in extreme conditions. Each bag is supplied with a lightweight dry bag compression sack for the trail and a dedicated storage sack for home.

Rab Neutrino -18°C Features

• 10D Pertex® Quantum ripstop
• 20D Pertex® Quantum on the base and footbox
• 800FP European goose down with Grangers fluorocarbon-free hydrophobic finish
• Longitudinal chest baffles
• Sleep comfortably on your side thanks to the sidewall baffles
• Cinch in hood
• Two-way zip
• Insulated zip baffle
• YKK® anti-snag zip insert and anti-snag internal zip guard
• Anatomically shaped foot box
• Lightweight dry bag compression stuff sack
• Zipped storage sack with water-resistant base
• Tapered mummy shape
• Hand-filled in Derbyshire UK