Rab Women's Neutrino Down Sleeping Bag (-12°C/10°F)

Trusted by mountain athletes the world over, the Rab Neutrino is a benchmark in down sleeping bag performance. It pairs outstanding warmth-to-weight with a robust all-mountain design, making it an adaptable companion for everything from long-distance alpine traverses to demanding winter ascents where reliable warmth is non-negotiable. Fabric placement is deliberate, maximising durability where the bag meets rough ground and loft where it benefits warmth retention most. At the core is Rab's L.O.F.T 3D™ baffle construction, which locks 800FP European goose down firmly in place from hood to footbox, eliminating cold spots throughout. Each bag is hand-filled in Derbyshire, UK, so the down goes in fresh, never pre-compressed, preserving its loft and insulating performance from the very first night out.

Features

• Longitudinal chest baffles work to retain heat efficiently around your core.
• L.O.F.T 3D™ helix-shaped baffle construction prevents down migration and eliminates cold spots for consistent warmth across the whole bag.
• Lighter 10D Pertex® Quantum ripstop on the top shell maximises loft and packability, while more durable 20D Pertex® Quantum ripstop on the base and footbox handles rough ground.
• Sidewall baffles reduce seam-related cold spots and improve comfort when sleeping on your side.
• Down-filled hood cinches closed to seal in warmth; down-filled neck collar sits snug to stop draughts.
• Two-way zip allows ventilation when needed, with an insulated zip baffle to block cold air as temperatures drop.
• Internal cordlocks sit below the collar bone for greater comfort during side sleeping.
• YKK® anti-snag zip insert and internal anti-snag zip guard.
• Anatomically shaped footbox allows a natural, relaxed sleeping position.
• Includes a lightweight dry bag compression stuff sack and a zipped storage sack with a water-resistant base for home storage.
• Hand-filled in Derbyshire, UK.
• Tapered mummy shape.

Specifications

Sustainability Features

• 39% total recycled content by weight.
• Outer shell and liner fabrics: 100% recycled materials.
• Zips: 59% recycled; trims: 63% recycled.
• Fluorocarbon-free (PFAS-free) DWR on all outer fabrics, compliant with current EU and US legislation.
• Grangers fluorocarbon-free hydrophobic down finish on the insulation.
• 42% renewable energy used in product manufacturing.

Technology

L.O.F.T 3D™ Chamber Technology

Rab's proprietary L.O.F.T 3D™ baffle system replaces traditional sewn-through construction with helix-shaped baffles that stop down migrating within the bag. Where traditional sewn-through baffles create cold spots at every seam, L.O.F.T 3D™ eliminates those weak points, keeping fill evenly distributed for consistent warmth across the entire sleeping area.

Pertex® Quantum

The Neutrino uses two weights of Pertex® Quantum ripstop nylon. The lighter 10D version covers the top of the bag where loft and packability are the priorities, while the more durable 20D version covers the base and footbox where abrasion resistance is needed on rough terrain and around the tent floor.

Video