Woman in a blue Mammut puffy jacket and cap leans against a mossy tree in a lush forest setting.

Mammut
DRY
DOWN

Stay warmer for longer with Mammut DRY DOWN – our new quick-to-dry down that retains its insulating effect, even in wet or humid conditions.

We love the mountains, but they can be unpredictable – which is why we developed Mammut DRY DOWN. Designed to keep you warmer for longer, our down is water-repellent, maintaining loft and insulation even in humid conditions. Whether you're on a damp morning hike or a multi-day tour, your jacket will keep you comfortable and dry.

The benefits

  • Keeps in the warmth

    Treated with a Nikwax water-repellent finish, it absorbs 90% less water, ensuring your jacket retains loft and insulation.

    benefits gif 01

  • Designed responsibly

    Made with responsibly sourced down and treated with a PFC-free finish – promoting animal welfare and environmental care.

    Close-up of a Mammut dark blue quilted fabric called dry down with horizontal stitching lines, highlighting its textured and padded surface perfect for mountaineering gear.

  • Quick drying

    Dries 30% faster than untreated down – no need to worry about a damp jacket during expeditions or multi-day trips.

    A Mammut dry down jacket showcased with its fluffy white ball of premium down feathers against a dark backdrop.

Designed for

    Designed for

  • Person wearing a blue and black Mammut puffer jacket with a hood and red-tinted sunglasses, outdoors in a mountainous setting.
  • Woman in a Mammut navy dry downjacket and cap, leaning against a tree with windblown hair, looking thoughtful during an outdoor adventure.
  • Man in a Mammut blue and black dry down jacket standing outdoors, near a tree, facing away from the camera.
  • Close-up of a person wearing a Mammut dark blue dry down jacket featuring the iconic embroidered Mammut logo on the sleeve.

Styles with Mammut DRY DOWN 

"DRY DOWN really elevates our down insulation jackets to new heights. Simply with a coat of PFC-free water-repellent finish that doesn't add any weight, you can stay warmer and more comfortable in your DRY DOWN jackets, even when the weather turns wet and unpredictable."

Susanne Leutner, Product Manager Apparel

How the technology works

Abstract white clouds on a dark background, resembling the fluffy textures of a Mammut dry down jacket.
Individual in a Mammut black hooded dry down jacket gazing sideways against a neutral background.

We love down for its lightweight feel and exceptional insulation, however, traditional down loses its loft and warmth when it gets wet – even from perspiration. That’s why we've developed Mammut DRY DOWN.

Using a Nikwax PFC-free water-repellent finish, Mammut DRY DOWN retains warmth and loft for up to seven days of water exposure. Designed in the Swiss Alps and tested by athletes, Mammut DRY DOWN is developed with damp, unpredictable weather in mind – making it perfect for ski tours, multi-day hikes, and challenging alpine conditions. What's more, the down is responsibly sourced and RDS-certified to protect animal welfare.

With Mammut DRY DOWN, you can count on high-performance warmth and comfort, all while packing light.

Compare Mammut DRY DOWN

Water absorption

Drying time

Water exposure without clumping

Mammut DRY DOWN

Untreated down

90% less
Fast absorption
30% faster
Slower
7 days
180 minutes

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Person smiling in a Mammut orange rain jacket, adjusting the hood outdoors near a scenic lake and lush greenery in the background.