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This lightweight sleeping bag is perfect for mountain bivi's, lightweight backpacking and weight conscious travellers thanks to it's hydrophobic down content and lightweight outer fabrics. 
This lightweight sleeping bag is perfect for mountain bivi's, lightweight backpacking and weight conscious travellers thanks to it's hydrophobic down content and lightweight outer fabrics. 

Rab Neutrino 200 Sleeping Bag Firecracker

£229.50  £270.00  15% off
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Rab Neutrino 200 Sleeping Bag Firecracker Information

Season : 2021S C

Brand : Rab

Code : QSM-56-FC-LZ

What is the Neutrino 200?

Newly updated and revised, the Neutrino (formally known as the Neutrino Endurance) is an exceptionally warm, packable, high quality down sleeping bag for spring/summer trips where weight and pack size is priority. Rab's 800 fill power down and weather resistant outer fabrics ensure reliable warmth in damp, humid conditions.

What is the Neutrino 200 made from?

Insulation: Arguably the most impressive aspect of this bag is the insulation and the way it's distributed across the bag in clever baffle designs. Inside, you'll find an exceptionally high quality 800 fill-power, hydrophobically treated, R.D.S certified European goose down; we know there are quite a few acronyms there so we'll break it down. 800 fill-power is some of the highest quality down available and is lighter, more packable and far warmer than an inferior down quality; an ounce of this down will occupy 800 cubic inches of space when lofted fully. R.D.S stands for Reponsible Down Standard and ensures the down is humanely sourced from happy Geese which haven't been live-plucked or mistreated, and lastly the down is treated with a Nikwax product to increase the down's performance in damp conditions. This does not make this a waterproof bag, but it does mean it will loft better, stay warmer and dry faster than untreated down.

The quality of the bag isn't everything though, if down isn't lofted correctly it won't perform at its best, therefore Rab have improved this years Neutrino by offering a new baffle design in trapezoidal chambers; this prevents the down from moving around the bag and increases the loft and warmth. An extra baffle has been added around the neck line of the bag seal in the warmth even more effectively, while an angled footbox prevents your feet from compressing the down.

Outer fabric: Surrounding the insulation is a lightweight yet weather resistant Pertex Quantum fabric. This fabric is wind resistant, water resistant and highly breathable, ensuring you stay warm yet comfortable in warmer seasons. This fabric also compresses down to almost nothing when pack size is a main priority (besides staying warm!).

What is the construction used?

If that wasn't enough of an information overload, Rab store the down in trapezoidal chambers to increase warmth and decrease the liklihood of cold spots. This not only increases the warmth of the bag but also allows the down to loft back up to full size after being compressed for extended periods of time.

Does it have any other features?

The Neutrino 200 features a 3/4 length glow in the dark zip with a full baffle behind the zip to prevent heat loss, a cotton storage sack to store the bag when you're not in the mountains, a compression sack to allow the bag to compress to a fraction of its original size, an internal stash pocket for a phone or headtorch and a mummy shape to reduce the amount of dead space inside the bag. 

How does the Neutrino 200 fit?

The Neutrino has always had a slim, tapered fit; this is to allow the bag to compress smaller and to offer greater warmth. The more dead space inside a bag, the longer it will take for your body to warm it up, reducing efficiency. There is enough room to roll over and to sleep comfortably, but it is snug.


The Neutrino 200 is the perfect bag when weight and pack size are priority. The lightweight outer fabric, high quality insulation and clever construction techniques allow it to pack down to almost nothing, yet offers enough warmth for spring/summer adventures in the mountains.

  • Ideal for alpine bivis
  • Pertex Quantum outer fabric
  • 800FP R.D.S goose down
  • Hydrophobically treated
  • Tapered fit
  • 3/4 length zip with glowing zippers
  • Compression sack included
  • Loft sack included


How warm a sleeping bag do you really need? We’ve tried to help you by grouping our sleeping bags by their recognised comfort ratings. These are the ratings supplied by the brands that indicate the temperature at which you will remain comfortable whilst sleeping on an insulated sleep mat. After all, comfort is what you want when it’s cold and wet outside, and you’re all tucked up in your nice warm sleeping bag.

We always recommend that you choose your bag according to the coldest conditions you will experience; you can always unzip a bag if it is too warm, but trying to sleep when you’re too cold is just miserable. Bear in mind that we are all individuals, so we all feel the cold differently and that our own resistance will fluctuate depending on a whole load of factors, including how much we have eaten, whether we have consumed alcohol, whether we need a wee or what kind of mood we are in!

Sleeping bags do not generate heat; they only trap the heat we produce, so it is vital that you get into your bag when you are giving off warmth, don’t go to bed when you are cold, have a hot meal or a hot drink or do some brisk exercise to get you nicely warmed up.

Traditionally sleeping bag manufacturers provided their own temperature ratings based on their experience, the product's intended end-use and the perceived environment. However, each brand tested their bags in different ways, and it was hard to find a fair comparison between models. So, in 2005 a European standard for sleeping bag temperature ratings, EN 13537, was introduced to give consumers a comparable guide to sleeping bag performance across a range of brands and models. The ratings have four different temperature ratings to give you an indication of the bag's performance.

Comfort Rating: This is the temperature at which an average female should experience a comfortable night’s sleep. On average, women sleep colder than men, so this rating is some degrees above the "comfort lower limit" for a man.

Comfort Limit Rating: This is the lowest temperature at which an average male should experience a comfortable night’s sleep whilst laid down in a curled up position.

Extreme: This is a survival rating where the user is likely to suffer health damage such as Hypothermia. It should be treated with the utmost caution and not be relied on for general use.

However, the EN 13537 European Standard does not apply to down-filled sleeping bags with a fill weight of more than 800g; for those bags, you will have to rely on the manufacturer's experience and technical expertise, which is often more accurate!

Most reputable brands still use their own rating system alongside EN 13537, for instance, Mountain Equipment's “Good Night’s Sleep” and Rab’s “Sleep Limit”. These ratings are often the most accurate guide to the overall performance of a sleeping bag being used by an average outdoor enthusiast because they are based on years of expedition heritage, field trials, technological experience, and constant feedback.

But please bear in mind that all ratings are only a guide and, as mentioned earlier, there are a huge range of factors that can affect your comfort; if you are just not sure, it is always wise to go for a warmer model.

The biggest difference you can make to your overall comfort is to use an efficiently insulated sleeping mat. Once you get inside your sleeping bag, you instantly compress all the filling beneath you, greatly reducing its efficiency. Therefore using a quality sleep mat will ensure you are properly insulated from the cold ground, and you will be a lot more comfortable... Basically, there is no point in buying a top-quality sleeping bag if you are just going to lie down on the floor.

Technical Information

Weight: 520g

Insulation: 800FP R.D.S Certified European Goose Down w/ Nikwax Flourocarbon-Free Treatment

Zip: Left zip

Comfort: 6°C

Limit of comfort: 1°C

Extreme: -13°C

Sizing Information

Total length: 215cm

Max user height: 185cm

Packed length: 32cm

Packed diameter: 17cm

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