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Women’s Mountain Trekking Sleeveless Down Gilet - MT100

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Our team of mountain trekking enthusiasts designed this feather and down gilet for trekking in cool weather.


Compact design

Easily folds away into its right-hand pocket using a zip with double puller

Water repellent

Surface-treated outer fabric to prevent water from getting in. PFC-free

Abrasion resistance

Outer fabric: 100% polyamide, 35 g/sqm. 15 denier


Down with filling power of 800 CUIN (cubic inches). Jacket hem tightening. Cuffs


This gilet weighs approximately 210 g in size M


2 zipped hand pockets


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. For this down jacket with its 85% down and 15% feathers filling, the fill power is guaranteed to be 800 CUIN or more (international standard).

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

The durability and fill power properties of down give this jacket three 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

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.

We nevertheless recommend wearing a waterproof jacket over the padded jacket in the event of prolonged exposure to the rain.

How to maintain your quilted down jacket

The down jacket can be worn throughout the winter and will certainly need to be washed. But the less you wash it, the more it will retain its thermal insulation and water repellency.

Our advice:

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 to restore the water-repellent 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 renews the fabric’s water repellent properties and optimises its performance throughout the lifespan of your garment.

Weight of the filling

XS: 53 g

S: 57 g

M: 63 g

L: 70 g

XL: 75 g

2XL: 81 g

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 with a repair patch to prevent the tear from getting bigger or feathers from escaping. Don't you feel at ease carrying out this repair yourself? Don't worry! Some Decathlon workshops offer an in-store repair service to mend your padded jacket using a heat-bonded patch.



Padding: 15.0% Grey Duck Feather, 85.0% Grey Duck Down; Main fabric: 100.0% Polyamide; Main lining: 100.0% Polyamide; Padding - Inner fabric: 100.0% Polyester

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

Restrictions on use

Not suitable for mountain hiking in rainy weather


Test product

All our gilets are laboratory tested in 5 km/h winds and worn as a 2nd layer on a thermal mannequin (over a long-sleeved T-shirt). Their level of thermal insulation is measured on a scale of 1 to 5, so that you can make the choice that best suits your use. Worn underneath the TREK 100 down jacket, it can provide 6°C extra warmth when compared to a down jacket worn without the gilet. Choose the best suited to your activity.


2 Years

Agree by

10 trekkers (5 men and 5 women), independent of Decathlon, tested this padded gilet during a week-long trek in November 2016, in the Mont Blanc mountain range. The feedback given to us after this test let us validate this down jacket for mountain trekking.