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Neutrino 400 Down Sleeping Bag (20F)

Only %1 left
$400.00

Eliminating excess bulk with a highly tapered design and offering exceptional warmth for its weight, this bag is built for fast and light mountain missions. Filled with 800FP goose down and covered with a recycled, wind resistant Pertex® Quantum outer.

Weight : 775g / 27oz
Rab Sleep Limit : -7C / 20F
Pack Size : 35 x 23cm / 13.8 x 9.1 inches
Lightweight
Packable

Sleeping Bag Size Guide

Tapered Mummy Regular Long Wide Long Wide
Sleeping Bag Length 215cm / 84.6 in 230cm / 90.6 in 215cm / 84.6 in 230cm / 90.6 in
Max User Height 185cm / 72.8 in 200cm / 78.7 in 185cm / 72.8 in 200cm / 78.7 in
Internal Shoulder Girth 160cm / 63.0 in 162cm / 63.8 in 180cm / 70.9 in 182cm / 71.7 in
Internal Hip Girth 134cm / 52.8 in 134cm / 52.8 in 146cm / 57.5 in 148cm / 58.3 in
Internal Foot Girth 102cm / 40.2 in 104cm / 40.9 in 110cm / 43.3 in 112cm / 44.1 in
Pack Size 35cm x 23cm 35cm x 23cm 35cm x 23cm 35cm x 23cm
 
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Rab Promise

If any of our clothing or equipment fails we promise to help make it right with a repair or replacement, find out more here. Damage due to wear and tear or improper care can also be repaired for a reasonable fee.

Neutrino 400 Down Sleeping Bag (20F) $400 Sizing
$400

Product Characteristics

Lightness

Light Ultralight

Pack Size

Moderate Pack Size Ultra Low Pack Size

Environment Use

Cold Extreme Cold
i

These ratings compare our sleeping bags against each other. All our bags, at any rating, are of the highest quality.

Product Characteristics

Lightness

Light Ultralight

Pack Size

Moderate Pack Size Ultra Low Pack Size

Environment Use

Cold Extreme Cold
i

These ratings compare our sleeping bags against each other. All our bags, at any rating, are of the highest quality.

What It's Best For

Mountaineering
Multi-day Trekking
Fast & Light Adventures

Tell Me More

For the alpinist looking for a lightweight, low bulk bag suitable for cold temperatures, the Neutrino 400 offers exceptional packability and warmth for its weight. Designed with a narrow mummy fit, for reduced bulk and pack size, and constructed with lightweight, high performance materials. It’s perfect for three season mountain missions.

The Neutrino 400 is filled with 400g of 800FP, goose down, stabilised in chevron shaped baffles, cleverly designed to reduce the amount of fabric needed compared to traditional horizontal baffles. The trapezoid boxwall baffle construction allows the down to fully loft, eliminates cold spots, and maximises warmth. Additional baffles along the length of the zip and around the neck decrease heat loss, and with an adjustable drawcord around the hood you can cinch the bag around your face.

Now built with a recycled nylon lining and recycled Pertex® Quantum outer, it’s wind resistant and a little lighter on the planet too. The down is also finished with a Nikwax, fluorocarbon-free hydrophobic treatment for coping with condensation. It has a ¾ length zip with anti-snag zip guards, a zipped internal stash pocket and comes with a waterproof roll-top compression sack for easy stashing.

Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth.

The Specifics

  • Rab Sleep Limit:Rab Sleep Limit: -7°C (20°F)
  • Weight:(Regular) 775g/27.3oz, (Long) 835g/29.5oz, (Wide) 835g/29.5oz, (Long Wide) 895g/31.6oz
  • Product Code:QSM-90
  • 20D Pertex® Quantum recycled nylon ripstop (38gsm) with fluorocarbon-free DWR
  • Lining: 20D Recycled Nylon (38gsm)
  • 800FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (400g / 14.1oz)
  • Weight saving chevron baffle design, reduces down migration and optimises core warmth.
  • Trapezoidal boxwall construction with differential cut, to maximise loft and warmth
  • Close fitting adjustable neck baffle design for decreased heat loss
  • YKK 3/4 length main zip with synthetic filled baffle to trap warmth
  • YKK zipped internal stash pocket
  • Angled foot box for relaxed sleeping posture
  • YKK Anti-snag zip insert and anti snag internal zip guard
  • Hand-filled in Derbyshire UK
  • Zipped cotton sack with water-resistant base for home storage
  • Waterproof roll-top compression sack included
  • Main: 100% recycled polyamide. Lining: 100% recycled polyamide
  • Tapered Mummy Shape

Sleeping Bag Size Guide

Tapered Mummy Regular Long Wide Long Wide
Sleeping Bag Length 215cm / 84.6 in 230cm / 90.6 in 215cm / 84.6 in 230cm / 90.6 in
Max User Height 185cm / 72.8 in 200cm / 78.7 in 185cm / 72.8 in 200cm / 78.7 in
Internal Shoulder Girth 160cm / 63.0 in 162cm / 63.8 in 180cm / 70.9 in 182cm / 71.7 in
Internal Hip Girth 134cm / 52.8 in 134cm / 52.8 in 146cm / 57.5 in 148cm / 58.3 in
Internal Foot Girth 102cm / 40.2 in 104cm / 40.9 in 110cm / 43.3 in 112cm / 44.1 in
Pack Size 35cm x 23cm 35cm x 23cm 35cm x 23cm 35cm x 23cm

Behind the Design

Find out about the fabrics and features that make this gear unique.

Play Video

Pertex® Quantum

A soft, lightweight, windproof fabric that encourages insulation to fully loft. Highly packable and protective, it's ideal for mountain activities.

Pertex® Quantum

A soft, lightweight, windproof fabric that encourages insulation to fully loft. Highly packable and protective, it's ideal for mountain activities.

Fill Power - 800

Fill power is all about down quality, not quantity. Find out more about what fill power means for you when you're out in the mountains in cold conditions.

Fill Power - 800

Fill power is all about down quality, not quantity. Find out more about what fill power means for you when you're out in the mountains in cold conditions.

Rab Sleep Limit Explained

Need help choosing the right bag for your next adventure? This is our real-world assessment of a sleeping bag's usable temperature limit. Find out how we arrive at this rating and how you can use it to select your bag.

Rab Sleep Limit Explained

Need help choosing the right bag for your next adventure? This is our real-world assessment of a sleeping bag's usable temperature limit. Find out how we arrive at this rating and how you can use it to select your bag.

Neutrino Collection

Stripped back and lightweight the Neutrino embodies the Alpine spirit. Eliminating excess bulk while offering warmth and protection, it’s built for fast moving mountain missions. Ideal for the alpinist on big mountain bivis and hut to hut stopovers.

Neutrino Collection 

Stripped back and lightweight the Neutrino embodies the Alpine spirit. Eliminating excess bulk while offering warmth and protection, it’s built for fast moving mountain missions. Ideal for the alpinist on big mountain bivis and hut to hut stopovers.

RDS Certified Down

The Responsible Down Standard independently certifies down against animal welfare requirements and tracks it from the source to the final product.

RDS Certified Down

The Responsible Down Standard independently certifies down against animal welfare requirements and tracks it from the source to the final product.

Fluorocarbon-Free Product

This product no longer contains fluorocarbons. Whether that’s in a DWR, on the zips, the threads or in the fabric. Find out more about how we’re cutting fluorocarbons from our gear.

Fluorocarbon-Free Product

This product no longer contains fluorocarbons. Whether that’s in a DWR, on the zips, the threads or in the fabric. Find out more about how we’re cutting fluorocarbons from our gear.

It's In Our DNA

A Climate Neutral Company

We're reducing our carbon footprint while balancing any remaining emissions through carbon credits. It's not a final solution, but we believe in taking accountability for today's emissions while we reduce tomorrow's

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Fair Wear

We're working to make the garment industry fairer. We're dedicated to supporting garment workers' rights to safe, dignified and properly paid employment. Making garment production fairer for everyone.

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Rather repair than replace?

The Rab Service Centre is here to keep your gear in action, reducing waste and making more memories in the process. Find out if we can help you with a repair now.

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Our Ascent to Net Zero

We're committed to becoming a Net Zero business by 2030. We'll reduce all unnecessary carbon emissions from our business operations and will offset any that are left.

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Neutrino 400 Down Sleeping Bag (20F) Reviews

Shipping

Rab ships throughout the United States via USPS and FedEx Ground daily from our US warehouse in Colorado and will take between 2 and 5 days depending on your location. Orders over $50 qualify for Free Shipping, otherwise, a flat rate of $6.00 will be charged per order under $50. 2-day expedited shipping is available for a flat rate of $25. Orders must be placed before 12pm between Monday-Friday to be shipped the same day. Saturday delivery is not available.

For more information regarding shipping, including shipping charges and estimated delivery times, please visit our help center.

Returns

If you are unhappy with your purchase, please return it to us within 90 days of receipt (extended from 28 days until Christmas). The item(s) must be in resalable condition with tags attached. We are currently unable to exchange items and will refund products returned to us under the policy above.

Please note, we are not able to accept returns for underwear unless the product is faulty or damaged. We advise that you use a recorded courier service to return your item(s) as we cannot be responsible for items lost in the post.

For more information regarding returns and warranty, please see our help center.