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Forclaz Trek 100, Down Hiking Vest, Men's

Regular price: $49.99 Regular price:

The most compact sleeveless jacket which is warm and lightweight to boot!

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Sale price: $49.99 Regular price:

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Model: 8397299

Product Features

A photo of the Forclaz Trek 100, Down Hiking Vest, Men's in use

Forclaz Trek 100, Down Hiking Vest, Men's is designed for mountain backpacking over a few days in cool weather.

The most compact sleeveless jacket which is warm and lightweight to boot!


Down with a fill power of 800 CUIN. Jacket hem tightening. Cuffs.

Compact design

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

Water repellent

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


This gilet weighs approximately 7.8 oz in size L. 1.2 oz/sqm fabric; 15 Denier.

Product Customer Reviews

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718 Reviews
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Forclaz Trek 100, Down Hiking Vest, Men's,midnight blue
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Brilliant light body warmer.

Really light weight item. Very warm over a fleece mid layer. Useful zipped pockets take a big wallet and XL sized phone with ease. Folds down to a tiny pack size when the weather warms up.

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Excellent quality for the price

Bought size medium and size large for my husband, he was a little disappointed that the large was the better fit; but to be fair he is probably somewhere between the two sizes. This is similar quality to another lightweight gilet I looked at which was double the price. It’s been worn almost every day since Christmas so a great success. I was able to return the other size by post even though I bought in store, very quick and easy process once I’d emailed customer services.

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Exactly what I was looking for

Nice puffer vest to layering in this cold weather

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Unbelievably good

I would not usually waste time providing a review but feel compelled to share that this garment is excellent in quality and fit so represents unbelievable value. You can buy this and the jacket version for less than what you would pay for one down jacket alone from the most competitive brands yet it is 100 per cent comparable to them. Also impressive is that it is Responsible Down Certified. Extremely chuffed with it and want to wear it all the time. Btw, I am a slim 5"10 with a 30 inch waist and medium sizes as snugly as if it were fitted (so if you're prone to adding a few pounds over winter you may wish to size up).

Well fitted but quite shiny

I’m 6ft 4, slim and ordered Large. Top quality gilet, comparable with some high end brands in fact. Lengthwise it’s acceptable. Not too short but would have enjoyed another inch or so for complete satisfaction. Chest is to size, but the material (navy) is quite shiny. Doesn’t bother me too much but it didn’t look like that in picture do loses a star.

excellent value

I was ready to spend the money on a RAB until I watched a review on youtube, they compared this to a Mountain Hardwear Ghost Whisperer which is considered the Number 1 ...both this one and the Whisperer dont have a breast pocket or any internal pockets which is why I didnt give it a 5*, the warmth fit and quality are very good for the price. this was my first time ordering from these people and the service and speed was 5* .. I will shop here again ... NB: im normally a xl but ordered a xxl .... perhaps I am getting bigger :(

Good gilet but sized a bit tight

This is a good gilet, especially considering the price, but the size is on the small size. A tight fit helps the heat stay close to the body.

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Sleeveless gilet

Warm. Fits great and dual purpose, sport/ walking and casual.

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Great price for a good quality product.

Really pleased with this. Sensible pockets and fit, I'm slim but sized up to XL (L in other brands), didn't need to in the end. It's a good length where other gilets are quite short. Warm for the weight and robust fabric, I've worn it climbing under my harness. Only downside - the material is a bit shiny but appears matte in the images... not the end of the world but I prefer matte.

A good lightweight top

Very reasonably priced its that light weight you don't even feel you've got it on. And is very good when the Chill is in the air.

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smallish on the fit, and the zip feels cheap and catches on the internal baffle easily - so go a size bigger than you normally wear - but comfortable and warm

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Perfect for Autumn

I bought this as I needed something that would keep me warm during walks and singletrack cycling, but was not too bulky or interfered with my riding and it is perfect. Warm and easy to use...just waiting for winter to see if it is usable, but if not can be easily stored away until spring.

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Got two and love them - orange and black just wish you would do nicer colours for women

Down gilet

Bought this to keep the chill out when playing golf on dry chilly days. Haven't used it for the golf but have worn it out and about as casual wear. So far so good. Very lightweight, so warmth to weight is v.good. I like the close-fitting nature of these things. Suits a slimmer frame. I'm a 40" chest and Large size fits perfectly. Nice deep pockets and a draw-string waist is a good addition. Stuffs down to a small pack. Would I buy another...yes. For the price they're brilliant !

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Excellent product, warm enough tested till 5'

What a marvelous and comfortable product, ideal for indian weather as in afternoon it gets hot but you can still wear it and its tested till 5 degrees on issue at all.

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Size Guide

Size Guide Visual

Additional Product Information



  • 85% Grey duck down
  • 15% Grey duck feather

Main lining

  • 100% Polyamide

Main fabric

  • 100% Polyamide

Padding - Inner fabric

  • 100% Polyester cationic

Feather origin

Thanks to our traceability system, we can guarantee the origin of the feathers, in compliance with our commitment to use responsibly sourced materials. Our suppliers are committed to using only feathers that come from ducks that are bred for their meat and are plucked after slaughtering.

Fill power of the down/feather filling

This 85% down / 15% feather down sleeveless jacket has a guaranteed fill power of 800 CUIN (European standard). The fill power is a measure of the down's thermal insulation capacity and its potential to "trap" air. Consequently, the higher the fill power (i.e. the higher the CUIN number), the more space it occupies and the more air it traps thereby delivering more thermal insulation.

Weight of the filling

XS: 2.6 oz S: 2.8 oz M: 3 oz L: 3.2 oz XL: 3.5 oz 2XL: 3.7 oz 3XL: 4 oz

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: to provide equal warmth, feathers are lighter than synthetic padding. This saves even more weight in your backpack - Ultra-compressible

Care advice for a gilet filled with down and feathers.

The sleeveless jacket will be worn throughout the winter and will certainly need to be washed. Follow the instructions by clicking the link below: How to wash and dry your down jacket

The advantages of a gilet

A sleeveless jacket keeps the body warm: it protects the chest, neck and lower back from the cold, as these areas are especially sensitive to the cold. Given that there are no sleeves, it is not as heavy in the backpack, even more breathable when making a physical effort and extremely comfortable in use when worn under a jacket. Worn underneath the TREK 100 Down jacket, it can provide 6°C extra warmth when compared to a padded jacket worn without the sleeveless jacket.

In the event of rain

This sleeveless jacket's fabric 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 gilet is not waterproof. We therefore recommend wearing a waterproof jacket over the gilet in the event of prolonged exposure to rain.

How to reactivate the water-repellent property?

Follow the guide: And use the care product: Wash-in waterproofing product that restores the water-repellent properties It restores the water-repellent properties of the fabric and optimizes the performance of your garment throughout its lifetime.

A score for comparing the products' environmental impact

The product's environmental impact is calculated over its entire lifecycle using different indicators. An overall ABCDE rating is given to help you easily identify products with the best environmental performance by comparing and contrasting products of the same type (T-shirts, pants, backpacks, etc.). Decathlon actively promotes this environmental rating initiative. For more information:



Product testing

All our sleeveless jackets are laboratory tested in a 3 mph wind 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, enabling you to make the choice that best fits your use. Worn underneath the TREK 100 jacket, it can provide 11°F extra warmth when compared to a down jacket worn without gilet.

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