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Cumulus Panyam 600

5 reviews   |  

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Limited Edition Blue

The Cumulus Panyam 600 is a lightweight winter down sleeping bag designed for lightweight end uses. 

Not exceeding the magic 1kg barrier whilst offering incredible warmth to weight ratio, the Panyam 600 is ideal for those looking for a single bag for year-round technical use within the UK. Constructed using cutting edge design techniques, sustainable sourced 850 cuin Polish goose down and ultra-light Pertex Quantum fabric (weighing in at only 29 g/m2) the bag comes in at just 980g.

The trapezoid chambers, a shark-fin foot box and updated ergonomic design of the hood provide unique comfort. Additionally, draw cords and tapes have been added to the hood to combine with an independent, elasticated collar with velcro fastening to make for maximum adjustment.


Check out Rock + Run's detailed review of the Cumulus Panyam 600 here

Who are Cumulus?

Designed and built in Poland, Cumulus draw on 30 years of experience and know-how in down and textile manufacture to provide some of THE best sleeping bags on the market. At the vanguard of sleeping bag construction techniques and design innovation, Cumulus offer as many as five methods of chamber construction, each developed to offer its own unique benefits [Cumulus Down Sleeping Bag Construction article]. All bags use sustainably sourced Polish goose or duck down, high-grade face and liner fabrics from Pertex, YKK zippers and, unlike most other sleeping bag brands, are entirely constructed in the EU.

Cumulus clothing and sleeping bags hold the EDFA (European Down and Feather Association) certificate for ethical down sourcing.

Advice on Temperature Ratings

Temperature ratings are used to indicate a bags performance and help you decide between models. However, they are subjective and can be greatly affected by factors such as what you're happy to wear (clothing wise) in conjunction with the bag, your health and metabolism, how much you have had to eat or drink, humidity and altitude, the type of shelter used and whether you are using a suitable insulating mat.

As a guide, the "Comfort" rating indicates the range at which a woman gets a comfortable night’s sleep, the "Limit of Comfort" rating indicates the range at which a man gets a comfortable night’s sleep and the "Extreme" rating indicates a range at which a woman is protected from hypothermia. The Extreme rating is basically a survival rating and it is not advisable to rely on this for general use.

More Help? For further assistance on choosing your down sleeping bag, please view this article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: A Guide to Down Sleeping Bags.

Model Comparison
This model’s closest comparison would be a Rab Neutrino 600, although the Cumulus bag is slightly lighter.


  • Fabric: Pertex Quantum DWR, 29 g/m²
  • Filling: Polish goose down, 850 cuin
  • Construction: Trapezoid chambers
  • Independently filled top and bottom of the sleeping bag
  • Shark-fin foot box
  • 175 cm YKK separating zip with two self-locking sliders
  • Can be opened and ventilated at the bottom of the sleeping bag
  • Can be combined with other sleeping bags
  • Full length, down-filled, zip insulating baffle
  • Independent down-filled collar
  • 3D, adjustable hood with a draw cord, a lock and a tape
  • Mesh pocket with a zip inside the sleeping bag, a fluorescent puller
  • Three external eyes on the longer side of the sleeping bag used for drying it
  • Two eyes to hang the sleeping bag
  • Additional, large mesh bag to store your sleeping bag at home


    • Total weight: 980 g
    • Down weight: 600 g
    • Weight of unfilled sleeping bag: 380 g
    • Comfort temperature: -6 ˚C
    • Limit temperature: -13 ˚C
    • Extreme temperature: -32 ˚C
    • Maximum user height: 190 cm
    • Length: 208 cm
    • Width (top/bottom): 80/55 cm
    • Stuffsack’s dimensions (height/diameter): 29/19 cm
    • Stuffsack’s volume: 8.2 l
    • Number of down chambers: 36

      10 Year Warranty
      Made in the E.U.

        Customer Reviews
        5.0 Based on 5 reviews
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        Gary L.
        United Kingdom
        Now my favourite down sleeping bag.

        Have a few down sleeping bags but wanted to get another nearer the -10 range. Never heard of Cumulus before but after watching videos and reviews decided to give this bag a go. The loft in this is incredible and even though this was packed for a week in its stuff sack before actually getting it out on a recent trip, it lofted pretty much straight away. Really warm and comfy and you can feel the down on the bottom loft between your legs, which I have not noticed before on other down bags we own (not as expensive but not far off and good down sleeping bags). I have a couple of exped mummy style mats and I really like the way the zip goes very low to the bottom of the bag. I unzipped it all the way a couple of times, hooked the bag over the bottom of the mat and used it as a quilt. The collar is really warm, the hood doesn’t seem to have as much down as some of my other bags but not been cold enough to tell if this really makes any difference yet. I tend to wear a hat when sleeping anyway. There is a small storage pouch with a zip on the inside, round about chest level off to one side. The first few times I used the bag this felt a bit weird being where it was when getting in the bag, mainly because if the zip. To be honest though never noticed while sleeping. I really like the trapezoid design of the baffles which I think helps in the loft and mean there are no gaps between the baffles you get on some bags. You can often see this by holding the bag up to the light and you can see gaps where the baffles are sewn together and there is no down. Overall this is now my main bag and really pleased with. For a little known company in the UK, I can say their products are extremely good quality and in my opinion worth the cost.

        Marije S.
        United Kingdom
        Superb customer service

        Excellent products, and brilliant customer service. I needed to exchange for another sleeping bag, and no questions were asked.

        Matthias K.
        Großartiger Schlafsack

        Leicht, warm, super verarbeitet - so präsentiert sich der Kumulus Panyam. Er braucht dabei die Konkurrenz von wesentlich teureren Produkten der Firmen Vaude und co nicht zu scheuen. Echte Kaufempfehlung von meiner Seite!

        Nils W.
        Top Schlafsack

        Das Cumulus geile Schlafsack macht ist einfach nichts neues! Der Panyam ist zwar etwas schwerer als der Lite Line 400, aber dafür auch ganzes Stück wärmer. Wer also Bock auf Wärme und Gewicht unter 1kg hat ist mit dem Panyam Top ausgerüstet!

        Maximilian R.

        Sehr schön verarbeitet, warm, super für Herbst/Winter.