Robert Boesch

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Down Fillings

For sleeping bags, we use  exclusively premium down in 3 fill powers. Only the best down from the stomach and breast areas is harvested and carefully finished to generate perfect loft, hold optimal warmth and make it very durable.


The higher the cuin rating, the better the filling performance and insulation properties at the same weight. Mammut measures fill power using the official method of the International Down and Feather Bureau (IDFB) in which the down is steam-conditioned and measured in a Lorch cylinder.

Goose Down 850 cuin 95/5

  • Best down quality in the world
  • 850 cuin fill power rating
  • 95% goose down

Goose Down 800 cuin 95/5

  • High-performance down for expedition sleeping bags
  • 800 cuin fill power rating
  • 95% goose down

Down 650 cuin 90/10

  • Quality down with good loft
  • 650 cuin fill power rating
  • 90% down
  • Altitude EXP 5-Season

    $ 949.95