FORCLAZ Ref. 8550545 2776836

Women’s Mountain Trekking Down Jacket with Hood - MT900 -18°C

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Color: GRAY
  • GRAY
  • 8502893
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This down jacket has a filling power of 660 CUIN and heat-sealed seams so you are comfortable down to -18°C.


Compact design

Can be stuffed into its inner pocket to save space in the backpack

Water repellent

Completely water repellent fabric. Waterproof panels on the shoulders and hood.


Inserts stronger on the shoulders and wrists to withstand friction


Comfortable between -5°C and -18°C. Down with filling power of 660 CUIN.


This down jacket only weighs 490 g in size M


Zipped air vents that help to eliminate the heat generated by the body


Thermal insulation

This down jacket, worn as a 3rd layer, has been certified for a comfort activity temperature of -18°C during a standardised test in a thermal chamber.

The model is wearing a synthetic long-sleeved T-shirt and a light fleece underneath. It works with a simulated 5 km/h wind.

In our heat comparison tool, it represents 4 stars.

We have also tested this model in "static" mode; the comfort temperature is -5°C in this case.

Heat-sealed compartments.

How to measure the fill power of a down and feather wadding?

The fill power is a measure of the down's thermal insulation capacity and its potential to "trap" air. It is expressed in CUIN (cubic inches). So, down with a higher fill power (higher CUIN number) will occupy more space, trap more air and provide greater thermal insulation. This puffer jacket, filled with 85% down and 15% feathers, has a guaranteed fill power of 660 CUIN (international standard) or over.

What are the benefits of a duck down and feather filling?

The robustness and fill power properties of down give this jacket 3 qualities for hiking:

- Thermal insulation thanks to the air trapped in the down and feathers

- Ultra low weight: down is lighter than synthetic wadding while offering the same degree of warmth. This saves even more weight in your backpack

- Ultra-compressible

Reducing the risk of feather loss

The main stitching of the compartments containing the down and feather are heat-sealed to prevent the loss of feathers.

In case of rain

The material of the quilted jacket is water repellent. It allows drops of water to slide off the fabric which delays the penetration of water into the quilted jacket while you get out of the rain. The shoulders and hood of the jacket, which are more exposed to the rain, are waterproof. We nevertheless recommend wearing a waterproof jacket over the quilted jacket in the event of prolonged exposure to the rain.

How to care for a down jacket?

The down jacket can be worn throughout the winter and will certainly need to be washed.


In summary:

1/Machine wash with a detergent suitable for down or technical garments, at 30°, with 2 or 3 tennis balls. Gentle spin cycle.

2/ tumble dry with 2 or 3 tennis balls, and repeat 2 or 3 times until it is completely dry.

How do I reactivate the waterproofing properties?

Once you have cleaned your padded jacket, we recommend you use a water-repellent reactivator spray to preserve the hydrophobic properties of the outer fabric. This fabric’s water repellent properties and optimises its performance throughout the lifespan of your garment.

A snag? This is how to repair your down jacket

A tear on a padded jacket can happen when trekking! The good news is that it can be repaired so the tear doesn’t get any bigger or to stop the feathers from escaping. Don't you feel at ease carrying out this repair yourself? Don't worry! Our in-store Decathlon workshops offer a repair service to mend your padded jacket using a heat-bonded patch.

Weight of the filling

XS: 144 g

S: 152 g

M: 159 g

L: 170 g

XL: 180 g

2XL: 195 g



Filling: 15.0% Grey Duck Feather, 85.0% Grey Duck Down; Main fabric: 100.0% Polyamide; Lining: 100.0% Polyamide; Yoke: 100.0% Polyamide; Pocket: 100.0% Polyamide

Tips for storage and maintenance

Machine wash - 30° max - normal Machine wash - 30° max - normal
Do not bleach Do not bleach
Tumble dry - low heat Tumble dry - low heat
Do not iron Do not iron
Do not dry-clean Do not dry-clean

Storage tips

Store on a hanger in a dry place. Do not store folded in its pouch.

Restrictions on use

Not suitable for prolonged exposure to rain.


Test product

All our quilted jackets have been laboratory tested on thermal mannequins in 5 km/h winds, reproducing a hike with moderate exertion. This allows you to make the right choice by comparing the level of thermal insulation on a scale of 1 to 5.


2 Years