Trek900 Men's Mountain Trekking Down Jacket - Black



Made for mountain trekking for several days in cold weather
This down jacket has all the advantages. Warm and light, it is also compressible and can easily be placed in your backpack.
Sizes guide

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WarmthDown with inflating power of 660 CUIN Jacket hem tightening system.
Compact designEasily packs into its storage pouch
WeightThis down jacket weighs approximately 480 g in size L.
Water repellentSurface-treated outer fabric to prevent water from getting in.
Freedom of movementThe absence of a hood makes it more comfortable to wear with a waterproof jacket
Pockets2 hand pockets and 1 chest pocket with zip fastening to secure your items
Environmental impactScore C - Comparison: M warm long-sleeved jacket - technical details
Waranty2 Years
Technical Information

Feather origin
Thanks to our traceability system, we can guarantee the origin of the feathers, which are sourced in accordance with our responsible material commitments. Our suppliers are committed to using only feathers that come from ducks that are bred for their meat and which are plucked after slaughtering.
Fill Power of the down/feather filling
For this down jacket filled with 85% down/15% feathers, the fill power is guaranteed to be greater than or equal to 660 CUIN. The fill power is a measure of the down's thermal insulation capacity and its potential to "trap" air. Down with higher fill power (a higher CUIN number) takes up more space, trapping more air and providing greater thermal insulation.
Weight of the filling
XS: 162 g S: 170 g M: 178 g L: 188 g XL: 198 g: 208 g XXXL: 220 g
The advantages of a duck down and feather filling*
The down's long-lasting fill power gives it 3 important qualities for hiking: - Thermal insulation thanks to the air trapped in the down and feathers - Ultra-lightweight: with equal warmth, feather is lighter than synthetic wadding. This saves even more weight in your backpack - Ultra-compressible
Care instructions for jackets filled with down and feathers
The down jacket can be worn throughout the winter and will certainly need to be washed. Follow the instructions by clicking the link below:
In the event of rain
The material of this padded jacket is water-repellent. It makes drops of water run off the fabric so it takes longer for water to get inside the jacket, giving you time to find shelter. But the padded jacket is not waterproof. We therefore recommend wearing a waterproof jacket over the down jacket in case of prolonged exposure to rain.
A score for comparing products' environmental impact
The product's environmental impact is calculated over its entire life cycle using different indicators. An overall score from A to E is given to help you easily identify the most environmentally-friendly products by comparing products of the same type (T-shirts, trousers, backpacks, etc). Decathlon is committed to displaying the environmental data of its products. For more information:
SizesS to XXXL.

Weight480 g in size L.


Also available inblue.
Information / Concept / Technologie
Padding : 85.0% Grey duck down, Padding : 15.0% Grey duck feather Lining : 100.0% Polyamide Main fabric : 100.0% Polyester (PES)

Product test
All our down jackets are laboratory tested with 5 km/h wind, worn as a 3rd layer on a thermal mannequin (over a long sleeved T-shirt and fleece). Their level of thermal insulation is measured on a scale of 1 to 5, enabling you to make the choice that best fits your use.

Stockage tips
Store on a hanger in a clean and dry place


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Waste of time, don't bother. Ordered a 2XL for my father for christmas and when it came I was shocked at the size of this jacket. When I by Mens clothes I usually buy S or M and this ONLY just fit me... So there's no way on earth this can be 2XL.
Not just that, but I then discovered that I had to pay to return this item.
I couldn't find a phone number to talk to anyone so I had to waste a whole afternoon taking the item back to a store as it was very bulky and would have cost a fortune to post. I couldn't wait for an email reply as I need the money back to buy a new present.
Will not be buying clothes from Decathlon again as their sizing are clearly screwed up.
Excellent warm jacket
Used for 2 to 8 weeks
If anything it's too warm!
Down Jacket
Used for 3 to 6 months
Really well made jacket. Nice and warm. Handy zip pockets. Pack light storage bag provided. Classy looking style and well made. Happy Customer
So Good
Used for 2 to 8 weeks
Decathlon top quality, scrunches into it's own bag. Warm , light , great fit , good pockets , way better than overpriced big brands
Cosy and packable
Used for 2 to 8 weeks
Perfect for my 13 year old. Warm and comfy for school and packs neatly into his school bag.
2nd one pruchased
Used for More than 1 year
I lost my last one so purchased another one! It's nice and warm meaning most days I only need to wear a t-shirt underneath it!
Down jacket
Used for 1 week or less
Looks good, packs down well and keeps the wind out - so far. Used less than a week.
Warm & well made
Used for 2 to 8 weeks
Needs an inside pocket
Spot On
Used for 2 to 8 weeks
This replaced a Decathlon jack that was weeping feathers and is spot on in every respect!
Not suitable for the mountains
Used for 2 to 8 weeks
Purchased two weeks ago from your Braehead Store. Has been worn to the office and the jacket performs well on the journey into work (on a train).

However I went on a short 8km walk in the Kilsyth Hills, max altitude around 500m, temp 1.5C, wind 16mph ESE, dry and sunny. With the wind at my back there was a cold spot around my neck despite wearing a warm hat and trying to pull the hood of my fleece up to cover my neck, the jacket rode up my back on the uphill sections resulting in the base of my back being cold, the jacket is too short at the back.

Walking into the wind the jacket has a cold spot around the neck and the length of the front could also be longer for warmth, I was cold because of this.

I was glad I tested it in a short walk in winter conditions, I don't think it lives up to being 'Designed for The mountain trekker. Over a few days in cold weather.'

Suggested improvements, increase body lenght of jacket, add hood and it will be usable in the hills.
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