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Cumulus Panyam 600 (Large)

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

Barely 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 1002g.

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: 1002 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: 198 cm
    • Length: 218 cm
    • Width (top/bottom): 80/55 cm
    • Stuffsack’s dimensions (height/diameter): 30/20 cm
    • Stuffsack’s volume: 9.4 l
    • Number of down chambers: 36

      10 Year Warranty
      Made in the E.U.

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          Josef S.
          Hot hot hot

          Super light and warm enough