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Cumulus X-lite 300

Weight: 465 g | Polish goose down, 900 cuin

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379,00 €

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CUMULUS X-lite 300 - ultra-light model. Extremly light and extremly minimalistic sleeping bag after packing.

Simplicity and lightness are two words, that Cumulus describes their new X-lite sleeping bag series. Thanks to their functional, minimalistic design X-lite sleeping bags are the lightest in the world. The Toray Airtastic (19 g/m²) fabric and 900 cuin goose down filling of the highest quality guarantee that the weight of the sleeping bag will be barely noticeable in your luggage. Perfect 3-season sleeping bag, weighing just 465 grams!


Fabric: Toray Airtastic™ DWR, 19 g/m²

Filling: Polish goose down, 900 cuin



Total weight: 465 g

Down weight: 300 g

Weight of unfilled sleeping bag: 165 g



Comfort temperature: 2 ˚C

Limit temperature: -4 ˚C

Extreme temperature: -20 ˚C



  • Construction: Trapezoid chamber design
  • 2/3 length, 3 mm YKK® zip with 2 self-locking sliders
  • Minimalist, weight saving design and components
  • Down-filled zip insulating tube
  • Close fit mummy shape
  • Anatomical, shark fin foot box design
  • 3D shaped hood design
  • 2 different hood draw cords for comfortable adjustment in the dark
  • Construction: Trapezoid chamber design
  • Separately filled front and bottom
  • Can be combined with other X-Lite series bags
  • Stuffsack and storage sack included



Maximum user height: 185 cm

Length: 202 cm

Width (top/bottom): 77/51 cm

Stuffsack’s dimensions (height/diameter): 20/15 cm

Stuffsack’s volume: 3,5 l

Number of down chambers: 33


WARRANTY: 10 years



Cumulus - comparison of all sleeping bags


Why sleeping bag from Cumulus?


Down insulation guide

Data sheet
Weight465 g
Down weight300 g
Warranty10 years
Made inEU (Poland)
Down quality900 cuin (EU)
Comfort temperature2 ˚C
Limit temperature-4˚C
Extreme temperature-20 ˚C
Lenght202 cm
Width (top/bottom)77/51 cm
Maximum user height185 cm
Weight of unfilled sleeping bag165 g
Stuff sack’s dimensions (height/diameter)20/15 cm
Stuff sack’s volume3,5 l
Number of down chambers33
ConstructionH-box down chambers


Years of breeding experience, a specific climate and research facilities are the secrets behind the excellent parameters of Polish down, which is considered to be the best in the world. Despite technological advancement and attempts to make artificial insulation that would be just as reliable, down still remains unrivaled.

Cumulus down


We only use down from certified Polish producers. Thanks to their geographical proximity, we can monitor the production. We are absolutely sure down used by Cumulus has been ethically sourced. It is from free-range geese that have access to water. The excellent breeding conditions are also reflected in the down’s high quality.

Cumulus ethically sourced down


Pertex® and Toray®, two fabrics we commonly use in our products, are made in Japan. Renowned in the outdoor world, they are both high-performers and have an impressive resilience considering their lightweight structure. At 19g/m2 Toray Airtastic® is the lightest downproof fabric in the world.

Cumulus fabrics


YKK® is the most trustworthy zip producer in the world, whose zips highly outperform the competition. Almost all our products feature YKK® zip - from clothing, accessories, to sleeping bags.

Cumulus zips

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    100% money back

    30 days return policy

    You can return the product for any reason within the 30 days.

  • Express delivery
    Express delivery
    Next day delivery to all EU countries.

    Express delivery

    Choose Express delivery and you can start using gear the very next day.

  • Free Shipping
    Free Shipping
    Valid for all orders over 300 € within EU

    Free Shipping

    For all orders above 300€, we deliver within EU countries at no cost by standard courier service and with parcel tracking.

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