Is it warm enough for extreme cold?

Yes. Its 800 cuin natural down is designed for extreme cold at altitude, at belay stances, during a bivvy and at exposed stops.

Does it stand up to rain and snow?

It is water-repellent, not waterproof. In rain or snow, wear it under a waterproof jacket.

How should you wear it?

Wear it over a thermal base layer as an outer layer in cold, dry weather, or as a mid-layer under a waterproof jacket in rain or snow.

Does the hood fit over a helmet?

Yes, the hood fits over a mountaineering helmet.

How many pockets does it have?

One chest pocket and two zipped hand pockets, all accessible while wearing a harness.

What down does it use?

RDS-certified, 800 cuin duck down: 95% down and 5% feathers.

Which size should I choose?

It runs large: choose one size down from your usual size.

How do I care for my natural down jacket?

Wash in cold water with a specialist liquid down detergent and no fabric softener. Dry by patting regularly to redistribute the down: ideally in the tumble dryer on a gentle cycle with tennis balls. If the down clumps together, a water-repellent treatment (Down Proof) is recommended.

What are the delivery times for this product?

If you place your order before 1 pm (excluding weekends), it will be dispatched the same day. Allow 2 to 4 working days for home delivery or collection point delivery within mainland France.

Can I return the item if the size doesn't fit?

Yes, absolutely. You have 30 days to return it and get a refund or an exchange. Return shipping is free. The item must be new, unworn, unwashed, and have its original tag.

Women's extreme-cold down jacket – Khumbu

299,90 €

3 reviews

Harness-compatible

Helmet-compatible

Insulating

510 g (size S)

Black

Delivered from Thu 22 Oct.

Free returns within 30 days

Available in several versions

Men Women

Very warm down jacket Warm down jacket

Free repairs for life

By La Réparerie, our repair service.

KHUMBU

299,90 €

3 reviews

Delivered from Thu 22 Oct.

Free returns within 30 days

Who did we design it for?

For women mountaineering in extreme cold at altitude who need an expedition down jacket for belay stances, a bivvy and exposed stops.

How warm is it?

Very warm: its 800 cuin natural down retains heat at belay stances, during a bivvy and in extreme cold at altitude.

How much does it weigh, and how small does it pack?

510 g in size S. It compresses and packs away at the bottom of your summit pack between sections of the climb.

What makes it different?

Our CIMACUIN technology: RDS-certified, 800 cuin natural down that packs down into the bottom of your rucksack and insulates as soon as you put it on. An excellent warmth-to-weight ratio.

Its performance

Compressibility

Packable

Lightweight

510 g (S)

Warmth

Wind protection

Strong wind, 60 to 90 km/h

Ideal for

Mountaineering

Ski hiking

Hiking

A shelter you can carry with you

At exposed belays, on a bivvy or on the ridge when the wind picks up: the cold at altitude gives you no respite, and your body heat drops as soon as you stop.

This down jacket traps warmth as soon as you put it on. Its helmet-compatible hood tightens with a drawcord; its pockets remain accessible under a harness, and its two-way zip lets you belay without opening it fully.

It packs away at the bottom of your rucksack between sections, ready for the next stop.

Because at altitude, the cold is more than a matter of comfort.

Key features

Helmet-compatible hood

The hood is compatible with a mountaineering helmet.

Central zip with double sliders

The central zip has two sliders. This means you can belay your climbing partner without opening your jacket fully.

Harness-compatible pockets

The pockets have been positioned so they remain accessible even when wearing a harness.

Adjusters

Reliable adjustment systems to dial in the perfect fit on your down jacket.

Chest pocket

Chest pocket to keep essential items within easy reach.

CIMACUIN Technology

Natural insulation delivering excellent thermal output in cold conditions.

High fill power (cuin) : natural down creating insulating air pockets to effectively retain body heat.
Very high compressibility : compacts tightly to reduce the garment's volume and make storage easier.
Exceptional warmth-to-weight ratio: delivers optimal insulation while maintaining great lightweight performance.

CIMACUIN technology is built around down selected for its quality and durability, delivering reliable thermal performance over time.

Details

Specifications

Weight

510g (S)

Brand

Cimalp

Wind resistance

Strong wind, 60 to 90 km/h

Waterproofing

DWR water-repellent treatment

Size type

Women's Top

Traceability

Manufacturing: China
Main fabric: 100% Recycled nylon
Weaving/Knitting: China
Dyeing/Printing: China
MATERIAL CHARACTERISTICS: Product containing at least 30% recycled materials
Releases plastic microfibres into the environment during washing

Reviews

4.7

Based on 3 reviews

5

66%

4

33%

3

0%

2

0%

1

0%

Customers recommend the usual size

Thierry.d

Verified customer

Ordered size XS Ordered color Noir

Translated review

28/01/2026

Exchanged for a size S. Excellent customer service; the exchange was very quick, only one week between sending and receiving the returned product. So, very satisfied indeed, and the product meets our expectations. In short, top-notch!

ANNE-SOPHIE.H

Verified customer

Ordered size XS Ordered color Noir

Translated review

23/01/2026

Fits perfectly, very well sized.

Alice.K

Verified customer

Ordered size XS Ordered color Noir

Translated review

23/02/2026

Same opinion