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Cumulus Magic 100 Zip Sleeping bag

The lightest sleeping bag with a zipper ever made - 240 g! High-quality goose down. Limit temperature 10°C.

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240 g Weight in grams. We check the weight of almost all items thus our weight information is often more precise than the one given by manufacturers.
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from  237.40 (from  196.20 excl. VAT)

Product information

  • Manufacturer: Cumulus
  • Product code: P7K-CML-M100ZIP-M

The Cumulus Magic 100 ZIP is a new version of the older Magic 125 ZIP. Thanks to even higher quality down (900 cuin), the new version is even lighter and smaller when packed than the previous one, but retains the same insulating properties. According to the manufacturer, it is the lightest sleeping bag in the world with a zipper - it weighs only 240 g! The weight goes hand in hand with the packed volume, which is truly shocking for a sleeping bag (1,6 litres). The sleeping bag is made from Toray Airtastic, a premium ultra-lightweight fabric. It is filled with high quality goose down (900+ fill power). These materials guarantee the best weight/insulation ratio - the sleeping bag is suitable up to 10 °C. With this model, Cumulus confirms that it is one of the world's leading ultralight sleeping bags.

Note: Currently, sleeping bags with synthetic fillings do not have insulation capabilities comparable to sleeping bags made of high-quality down at the same weight.

Comparison of Cumulus Sleeping Bags

Model Comfort Limit Extreme Weight Weight of the filling Size in a stuff sack Volume of a stuff sack Maximum body height
Extra-long Shortened
Shoulder width of a sleeping bag
Magic 100 Zip 13°C 10°C -3°C 240 g 105 g 18 x Ø11 cm 1,6 l 178/192 cm 75/80 cm
X-lite 200 4°C 0°C -15°C 350 g 200 g 18 x Ø13 cm 2,4 l 183/196cm 77 cm
LiteLine 200 9°C 4°C -10°C 495 g 200 g 19 x Ø15 cm 3,4 l 183/196/170 cm 77 cm
X-lite 300 2°C -4°C -20°C 465 g 300 g 20 x Ø15 cm 4,2 l 183/196/170 cm 77 cm
LiteLine 300 4°C 0°C -15°C 600 g 300 g 22 x Ø16 cm 4,4 l 183/196/170 cm 77 cm
X-lite 400 -1°C -7°C -25°C 575 g 400 g 23 x Ø15 cm 5,5 l 183/196/170 cm 77 cm
LiteLine 400 2°C -4°C -20°C 705 g 400 g 25 x Ø17 cm 5,7 l 183/196/170 cm 77 cm
Panyam 450 -0°C -6°C -23°C 820 g 450 g 26 x Ø18 cm 6,6 l 188/198/178 cm 80 cm
Panyam 600 -6°C -13°C -32°C 970 g 600 g 29 x Ø19 cm 8,2 l 188/198/178 cm 80 cm
Teneqa 700 -10°C -18°C -38°C 1150 g 700 g 33 x Ø20 cm 10,4 l 188/203/173 cm 85 cm
Teneqa 850 -15°C -23°C -46°C 1310 g 850 g 32 x Ø21 cm 11,1 l 188/203/173 cm 85 cm

How to understand the temperatures?

Although Cumulus does not test the "Comfort", "Limit" and "Extreme" temperatures, they should correspond to EN 23537:2016. According to this standard, "Comfort" is, in short, the lowest temperature at which the average young woman can sleep in a sleeping bag in a relaxed position without being woken up by the cold. The "limit" (sometimes referred to as the "comfort limit") is set adequately for young men in a crouched position. Thus, for most people, the lowest temperature for comfortable sleep should be between the "Comfort" and "Limit" values. Experienced users in good condition and with warm clothes can sleep at lower temperatures without any problems, whereas very "frozen" and older women should add a few degrees to the "Comfort" temperature. "Extreme" is the temperature given for bare survival and should not normally be taken into account. We would add that the temperature inside the tent is usually higher than outside.

How do temperatures compare between different brands of sleeping bags?

Unless temperatures are given according to EN 23537:2016, it is difficult to compare sleeping bags across brands. However, for down sleeping bags, it is generally true that two sleeping bags with the same fill weight at the same down fill (e.g. 300g of 850+ cuin down) will be approximately the same warmth. A sleeping bag with either a higher fill weight or a higher fill weight (e.g. 900 cuin) will be warmer. Differences in construction, unless it is for example the absence of a hood, usually play a minimal role. It is therefore advisable to compare the filling used in particular and not to be misled by the stated temperature alone.


  • High quality goose down filling 900+ cuin (cubic inches) - EU standard
  • 98% down, 2% small feathers
  • 55% front fill, 45% rear
  • feathers are ethically sourced from Polish geese (never plucked alive)

Polish feathers are renowned worldwide as the highest quality ever - partly due to the high differences between summer and winter temperatures, which force the geese to produce very high quality feathers. Partly the good conditions under which the geese are kept (outdoors, with access to water and air).
These feathers are 100% hypoallergenic - we can say from our own experience that even a member of our team with feather allergies has been using Cumulus sleeping bags for a long time without any problems. He hasn't even had a hint of trouble when visiting the Cumulus production facilities, including the room where the sleeping bags are filled, and the feathers fly literally everywhere.


  • ultralight Toray Airtastic, 19 g/m2
  • very pleasant to the touch
  • windproof
  • DWR water repellent finish
  • Featherproof

Other features:

  • drawcord top hem
  • two-way ultra-lightweight YKK zippers along almost the entire length of the sleeping bag
  • 2 sleeping bags can be combined (but this zipper is not compatible with other Cumulus models) (If you want to use this option, please write it in the note before ordering. It is necessary to ensure that one sleeping bag has a zipper on the left and the other on the right.)
  • "X" chamber system
  • comes with a large storage sack and a compression sack

For even better compression and water protection, we recommend the Evac Compression Dry Bag or a combination of a sleeping bag compression pack and a waterproof bag.

Cumulus sleeping bags are hand sewn. One seamstress always sews the entire sleeping bag from start to finish. The filling of the individual chambers is also done by hand for precision.

Lifetime warranty.

If you want a sleeping bag of a different size or with other different specifications, contact us. For custom made sleeping bags, delivery time is 1-3 months


Down goose down 900 cuin (ethical sourcing)
Comfort temp. 13°C
Limit temp. 10°C
Packed size 18 x Ø11 cm
Fill weight 105 g
Stuff sack volume 1,6 l
Material Toray Airtastic, 19 g/m2
Weight 240 g (up to 178 cm - standard left, up to 178 cm - standard right)
299 g (up to 192 cm - long left, up to 192 cm - long right)
(there may be slight variations in weight between specific pieces)

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2023/11/08 16:41

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