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Cumulus Transition Down Pants

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Waterproof, extremely light and durable, the Cumulus Transition down pants are perfect for adding warmth when trekking, camping or skiing.

Manufactured from durable Pertex Quantum fabric (30 g/m2), the Cumulus Transition Down Pants are filled with humidity-proof hydrophobic 850 cuin down. Additional strengthening is provided by the waterproof Pertex Quantum Pro fabric (44 g/m2), which makes them an ideal fit for winter trekking, camping and skiing. They have been designed for providing high comfort in extreme weather conditions.

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 down clothing and sleeping bags on the market.

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


  • Outer fabric: Pertex Quantum Pro, 29 g/m²
  • Inner fabric: Pertex Quantum, 30 g/m²
  • Pertex Quantum Pro (44 g/m2) fabric strengthening of the upper-back, knees and inside of the legs
  • Filling: Polish hydrophobic goose down, 850 cuin
  • Construction: Stitched through
  • Increased performance against humidity thanks to ultrathin membrane
  • 2 zipped handwarmer pockets
  • Raisable back
  • Ankle drawcords with Velcro and press studs
  • YKK 3 mm splash-proof zippers
  • Belt and loops
  • Ability to attach braces
  • Waist drawcords
  • Side zipper chambers with press studs
  • Insulated fly
  • Can be packed in the external pocket


      • Total weight (size M): 335 g
      • Down weight (size M): 108 g
      • Stuffsack’s dimensions (height/diameter): 16/13 cm
      • Stuffsack’s volume: 2,1 l


      • See size table in product image gallery
      Customer Reviews
      5.0 Based on 1 reviews
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      Filter Reviews:
        Ian M.
        United Kingdom United Kingdom
        down filled trousers

        excellent, light, warm, good fit, enough leg length even for me !