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.

Men's down jacket for extreme cold

299,90 €

7 reviews

Harness-compatible

Helmet-compatible

Insulating

610 g (size M)

Red / Orange

Delivered from Tue 3 Nov.

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.

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Who did we design it for?

For mountaineers tackling 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?

610 g in size M. 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

610 g (M)

Warmth

Wind protection

Strong wind, 60 to 90 km/h

Ideal for

Mountaineering

Ski hiking

Hiking

Warmth that stays with you when you stop

At altitude, the cold sets in as soon as you stop: at a belay, on a bivvy or when the wind picks up on the ridge. Your body heat drops within minutes, and every minute without insulation costs energy.

This down jacket traps warmth as soon as you put it on. Its large hood fits over a helmet, 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 summit pack between sections and comes out for the coldest stops.

Because in the high mountains, warmth is a resource you can't afford to waste.

Key features

Helmet-compatible hood

The hood is compatible with wearing a mountaineering helmet.

Central double-slider zip

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

Harness-compatible pockets

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

Tightening systems

Reliable tightening systems to perfectly adjust 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

610g (M)

Brand

Cimalp

Wind resistance

Strong wind, 60 to 90 km/h

Waterproofing

DWR water-repellent treatment

Size type

Men's Top

Traceability

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

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Reviews

4.3

Based on 7 reviews

5

42%

4

42%

3

14%

2

0%

1

0%

Customers recommend the usual size

Warmth

Comfort

Packability

didier L.

Verified customer

Height 168cm Usually wears L Ordered size L Ordered color Noir Usage Voyage, Randonnée

Translated review

30/10/2026

Perfect down jacket. It could use a bit more fill, but it compresses really well. Excellent value for money.

franz.B

Verified customer

Ordered size S Ordered color Noir

Translated review

12/01/2026

Easy, warm, lightweight, nothing but good qualities.

Herbert.T

Verified customer

Ordered size S Ordered color Noir

Translated review

08/01/2026

Hello, I expected more thickness, perhaps a greater amount of down, but I was surprised by the warmth once worn. It might lack cords to tighten the hood when there is no helmet opening.

Roch.V

Verified customer

Ordered size XL Ordered color Bleu

Translated review

17/12/2025

Excellent value for money!

Alexandre.T

Verified customer

Ordered size S Ordered color Noir

Translated review

28/11/2025

Beautiful coat, it's just a shame I don't understand why the hood is so big. I also don't have the springs to tighten the hood. Otherwise, it's very warm. It's a shame I paid full price when it was on sale.