Rab Neutrino -6 °C – Women's Down Sleeping Bag

Product detailed description

The Rab Neutrino -6 °C down sleeping bag is a three-season model from the new line of popular down sleeping bags Rab Neutrino.

Rab is down 

It has been over 50 years since Rab Carrington gained his first experience sewing down sleeping bags in Buenos Aires, Argentina. And it has been 45 years (2026) since the first sleeping bag under the Rab brand saw the light of day. Even in his very first model, Carrington incorporated his extensive experience from mountain climbs. Thanks in part to his good reputation within the close-knit climbing community, demand for his sleeping bags began to grow quite rapidly. 

The goal was to create high-quality, lightweight, and warm sleeping bags that would perform well in the mountains. At the same time, he stuck to his motto:

“Nothing fancy or overly technical—just honest, functional pieces that you’d rather repair than replace. By climbers, for climbers”.

And we at Nalehko are very happy, that Rab is continuing in this direction even in the 21st century. Simply put, products you can 100% rely on while trekking, and that won’t let you down even in the most demanding conditions. During our adventures, we ourselves have used countless models from this iconic British brand, and we’ve always been completely satisfied.

And that is precisely why, just like the other products in our range, we are delighted to offer them to you, our customers.

You can read the full story of Rab Carrington and the Rab Equipment brand here.

Rab Neutrino -6 °C

The main innovation is the use of the revolutionary L.O.F.T 3D™ chamber construction.  These are offset, spiral-shaped chambers that prevent down migration and maximize heat retention. At the same time, they enable top-notch insulation properties while reducing the sleeping bag’s volume and weight.

Longitudinal baffles effectively retain heat around the torso. The side baffles eliminate cold spots and ensure that you won’t lie on a seam when sleeping on your side. At Rab, they really went the extra mile for us “side” sleepers this time. Under the collarbone, you’ll find two straps that let you comfortably roll overeven while wearing the sleeping bag. It’s a small detail, but fully functional and a nice touch.

The Rab Neutrino -6 °C has a drawstring hood that fits snugly around your head, and a down collar that wraps around your neck. The zipper is a top-of-the-line two-way YKK with an anti-snag tab and a collar that prevents heat loss.

The sleeping bag has a "wide" mummy shape with an anatomically shaped "foot box." The generous cut ensures greater comfort while sleeping, with plenty of room for leg movement.

Material

Rabu has opted for the proven Pertex® Quantum in two strategically placed weights and denier(s). The more durable 20D Pertex® Quantum 38g/m² (black) is used on the bottom and sides of the sleeping bag—in short, in areas in contact with the sleeping pad. The lighter 10D Pertex® Quantum 26g/m² (yellow) is on the top and increases the loft of the down, packability, and at the same time reduces the total weight of the Rab Neutrino -6 °C. It weighs a mere 850 grams.

A combo that makes sense and works. As is typical for Rab, a DWR water-repellent finish is included fluorocarbon-free. In the same vein, the sleeping bag’s lining is made of recycled 20D nylon, 38 g/m².

Premium down 

And finally, the most important part. The Rab Neutrino -6 °C is filled with 400 grams of premium European goose down with a fill power of 800FP. This places it among the summer three-season sleeping bags. Grangers hydrophobic treatment (fluorocarbon-free, of course) combined with the DWR coating on the outer fabric provides solid water resistance for the entire sleeping bag. 

The down traditionally comes with a R.D.S. certificate of origin. All Rab sleeping bags are hand-filled in Derbyshire, UK. Rab also guarantees that its down has never been compressed prior to use, thereby retaining its loft and resilience.

Temperature Limits

Temperature limits according to ISO 23537-2:2022 are: Comfort: -0 °C, Limit: -6 °C, Extreme: -24 °C.

Of course, this should be taken with a grain of salt. We are all different, so the temperatures listed should be viewed more as a guide for choosing the right sleeping bag.  The standard is based on the parameters of a standard man—25 years old, 173 cm, 73 kg —and a standard woman—25 years old, 160 cm, and 60 kg.

The temperatures listed represent a range derived from a series of measurements, starting from the upper temperature limit at which a person is able to sleep through the night without waking up up to the extreme temperature that determines the minimum temperature at which a person can survive.

Our Experience

In our experience, with the Rab Neutrino -6 °C, we find sleeping comfortably at -5 °C more pleasant than sleeping at temperatures around 0 °C. This is a classic paradox for a sleeping bag in this temperature range. Dry frost cools the body less than a damp environment around freezing—moisture significantly reduces the material’s insulating properties and the sensation of warmth, so even a “warmer” night can paradoxically feel colder.

So, we can say that this time we agree with the temperature limit stated by Rab and confirm it.

A lot also depends on the use of a quality sleeping pad.  Thermal comfort can also be increased with a sleeping bag liner.

The Rab Neutrino -6 °C is a versatile sleeping bag that easily adapts to a wide range of activities, from long treks to mountain climbs.  Lightweight, durable, super packable and eco-friendly. Yeah, that’s how we like it!

P.S: Of course, you’ll get an ultralight compression sack for the trail, as well as a zippered storage bag with a waterproof bottom for home storage.

We also offer a warmer version Rab Neutrino -12 °C.

Rab Neutrino -6°C:

• L.O.F.T 3D™ chamber technology reduces down migration, increases thermal efficiency, and minimizes packed volume.
• Longitudinal chambers on the chest for greater thermal comfort in the torso area.
• Anatomically shaped hood with drawcord for maximum protection and heat retention.
• Internal loops positioned under the collarbone for greater comfort when sleeping on your side.
• Side-chamber construction for higher down loft and comfort when sleeping on your side.
• 3D anatomically shaped insulated collar around the neck.
• 3/4-length two-way YKK® main zipper with insulated flap.
• YKK® anti-snag zipper protection + internal zipper guard.
• Anatomically shaped foot section for a natural and relaxed sleeping position.
• Ultra-lightweight compression stuff sack.
• Zippered storage bag with waterproof bottom for home storage.
• Hand-filled in Derbyshire, UK.
• Mummy cut for maximum thermal efficiency.

Technical specifications:

• Weight 850 grams.
• Temperature limits according to ISO (23537-2:2022):
• Comfort: -0 °C, Limit: -6 °C, Extreme: -24 °C.
• Suitable for people up to 170 cm tall.
• Packed dimensions: 18 cm x 30 cm. 

Materials:

• 400 grams of European goose down with 800FP fill power and Grangers hydrophobic fluorocarbon-free treatment.
• 10D Pertex® Quantum ripstop (26g/m²) with fluorocarbon-free DWR treatment.
• 20D Pertex® Quantum ripstop (38gsm) with fluorocarbon-free DWR finish.
• Lining: Recycled 20D nylon, 38g/m².