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Forclaz Trek 100, Light Synthetic Down Packable Puffer Hiking Jacket, Men's

Sale price: $49.99 Regular price:

This eco-designed padded jacket is filled with 70% recycled polyester fill. With its high-tech features, compact size and slim fit, it saves weight for backpacking use while keeping you warm.

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Sale price: $49.99 Regular price:

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Model: 8501971

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Product Features

Forclaz Trek 100, Light Synthetic Down Packable Puffer Hiking Jacket, Men's | With this warm, light and durable padded jacket, you can trek comfortably in cool weather (between 23°F and 41°F, depending on whether you are walking or not).

This eco-designed padded jacket is filled with 70% recycled polyester fill. With its high-tech features, compact size and slim fit, it saves weight for backpacking use while keeping you warm.

A photo of the Forclaz Trek 100, Light Synthetic Down Packable Puffer Hiking Jacket, Men's in use


Comf. btw 23°F & 41°F. Fill with good fill power (4.4 oz/sqm) Jkt hem tightening


Fill made from 70% recycled polyester.

Compact design

Easily folds away into its left-hand pocket using a zipper with double pull


> 20,000 cycles in the Martindale test. 20 denier thread. Polyamide canvas

Water repellent

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


This padded jacket weighs approximately 13.1 oz in size M

Easy to maintain

Synthetic fabric and insulation that can be machine washed at 86°F.

Product Customer Reviews

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Forclaz Trek 100, Light Synthetic Down Packable Puffer Hiking Jacket, Men's,slate blue
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A hidden gem. With every penny!

I was a little concerned about how good this jacket could be at such a low price point. I tested the jacket on an overnight backpacking trip with temps down to the low 40’s. I was warm and comfortable. The jackets isn’t real thick but I couldn’t feel the wind come through it. I was impressed. I would’ve gladly paid $80.00 for this jacket. It’s definitely worth it. If your getting backpacking gear together and trying to stay on budget then you’ve found your jacket. Seriously! Oh and it folds into its left pocket. Which I used as a pillow.

Great Value

I normally wear a medium to large jacket (size 40 USA). Ordered a medium when I read the sleeves are long. Fits a little tight all the way around--would not be able to wear fleece under it. Not many extras on this but the overall quality is excellent. I recommend it. Wore it in the Black Hills down to 30 degrees wind chill. Below that you would need a shell over it. Long sleeves are nice to put over your hands!

Pocket and waist

Pocket is get caught in the zipper. Really frustrating to fight with the zipper every time I want to use my pockets. 2nd is the waist is a little tight for a medium. It has a draw cord which is great but does starts off too small.

Slim Fit And Nice Materials

I am 6'2" and slim build w/ 32" waist. The Medium is a comfortable but snug fit with a single base layer. Even so, the arms are plenty long, it sits quite low on the waist, and has a generous neck up top. It's like a Medium chest with Large everything else. For me it's perfect.

Great light insulation

Great little jacket to throw under a shell when it gets colder. Very light and comfy

Lightweight yet insulating

This is one of the best buys from Decathlon especially during the black Friday sale.... hiking was wonderful with it!

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Good Jacket

My son said it would be better with a hood.

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Great find

After trailing round many shops my son found this jacket which was exactly what he was looking for, reasonable price and easy to order on line and collect in shop

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Great coat size up

Lovely warm, light jacket , light rain no problem, only issue need to size up or no room for jumper underneath and slightly figure hugging at hip level

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Light and warm

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Only just large enough

Very happy for the pice . Only just big enough.

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Value for money I purchased one few yrs ago quality for the cost I would recommend

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Big or correct size

Been using Decathlon for years as I regularly go to Europe. I have learnt one thing. The sizing is European! Ie. Not good for British body shapes. The trousers and shorts never fit. The tops and jackets always have to be sized up. Until now. It would seem that if you are UK XL. Then buy UK XL. Alas sadly I had already removed the labels. Jacket wise I got it to wear under my motorbike jacket as the stock layering is always poor without exception. I could not wear my exisiting Rab as it has a hood. I do adventure tours so do not want to duplicate kit. One coat. Day and evening then (part of) pillow at night. For £27 this is a total bargain. And I have thrashed and trashed it this month. Only issue. The inner seems to come out of the cuffs when you put it on.

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Sizes are not accurate

This does not look like the picture, I purchased a large and in comparison to other coats I have bought I would class it as a small. Tight round the arms, chest and belly as well as short fit. Very thin, very poor quality. Completely out of proportion. Will be returning at my own expense!

Good product for price

This is warm enough and can be warm with or without layers underneath meaning it's versitile for a number of weather temperatures. Not sexeist looking jacket but no issues at these prices.

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Size Guide

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Additional Product Information


Main fabric

  • 100% Polyamide

Main lining

  • 100% Polyamide


  • 100% Polyester cationic

How warm is this padded jacket?

This padded jacket, when worn as a 3rd layer, has a temperature rating of 23°F that was certified during a standardized test in a thermal chamber. The model wears a synthetic long-sleeved T-shirt and a light fleece underneath. It works with a simulated 3 mph wind. We also tested this model under "static" conditions; its temperature rating is 41°F in this case.

Want to know more about the fill?

We use 100% polyester padding (70% recycled). The fill is made from silicon-coated spiral fibers that make it highly compressible and highly durable. Despite its low thickness and light weight, the air trapped inside gives it high insulation properties. It retains its warmth even when wet.

Do you know why the inner lining of your padded jacket is gray?

Because the fabric we use reduces CO2 emissions by 40%. The fabric used is innovative because it mixes a self-dyed black thread and an undyed thread. Compared to a conventional dyeing process, this process reduces by: • 66% fine particle emissions (PM2.5) • 74% Eutrophication of fresh water • 68% eutrophication of sea water

Additional sustainable development information

On the Trek 100 black and Trek 100 blue models, the outer fabric uses a clean process known as dope dyeing (the thread is dyed before the yarn is woven) reducing CO2 emissions by 36% More information:

Durable materials

This polyamide fabric that uses 20 denier thread can withstand 20,000 abrasion cycles. Martindale test, 12947-2 standard Outer: 100% polyamide fabric 1.4 oz/sqm, 20 denier Lining: 100% polyester fabric 1.2 oz/sqm, mix of 15 to 20 denier threads

Water repellent property of component (not to be confused with waterproofing)

A fabric is water-repellent when it allows water slide over its surface without seeping in. This prevents the fabric from swelling and keeps it lightweight and warm. The fabric is made water-repellent by treating its outer surface; however, this property may deteriorate with use. We recommend that you restore it after each wash

Pfc-free water-repellent treatment

On the Trek 100 padded jacket, the water-repellent treatment doesn't contain PFCs (perfluorocarbons), i.e. it is PFC-Free. PFCs are used to make a fabric water-repellent, but they are very toxic for the environment and people. By replacing the PFCs with other technologies that we are developing to enable the same level of performance, we are helping to reduce this environmental impact.

How to restore water-repellent properties?

Follow the guide! We recommend that you use the care product to treat and restore water-repellent properties


Inside flap under the zipper that protects from the wind. Elasticated cuffs Flap at the top of the collar to protect the chin. Tightening with an elastic cord and toggle at the hem.

A score for comparing products' environmental impact

The environmental impact of the product is calculated based on its entire lifecycle and using different indicators. A general score from A to E is provided to help you easily identify the most eco-friendly products by comparing products of the same type (T-shirts, pants, backpacks, etc). Decathlon is committed to displaying this environmental information. More information:



Product testing

In November 2017, 6 backpackers (4 men and 2 women) with part of the Forclaz design team tested this padded jacket for 4 days in the Southern French Alps. We were then able to make the final modifications and validate it for backpacking use.

Storage instructions

In order to preserve all the padding's fill power, store your padded jacket on a hanger rather than stuffing it in its pouch!

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual