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Women's Trek 100 Sleeveless Down Hiking Jacket

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Sale price: $49.99 Regular price:

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Model: 8397279

Product Features

A photo of the Women's Trek 100 Sleeveless Down Hiking Jacket in use

Women's Trek 100 Sleeveless Down Hiking Jacket is designed for women backpacking for several days in the mountains in cold weather.

The most compact of the sleeveless jackets – warm and lightweight to boot!


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

Compact design

Easily folds away in its right-hand pocket with a zipper with double pull.

Water repellent

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


This jacket weighs approximately 7.4 oz in size S. 1.2 oz/m² fabric; 15 Denier.


2 deep, closing hand pockets for storing gloves and hats.

Product Customer Reviews

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177 Reviews
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Women's Trek 100 Sleeveless Down Hiking Jacket,black
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Love this, so versatile, warm, flattering, HUGE pockets and easy to stuff in my bag /pack away. An essential!

Good lightweight gilet

Bought as an extra layer for my better half, who is delighted with it. Warm, but not cumbersome and fits well.

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I used the size chart on here and ordered accordingly, I'm a 16)18 I ordered a 2xl fits perfect, nice length

Nice but too tight across the chest

This is a really nice gilet but unfortunately for me it is way too tight on the chest. I'm 5'6 with a 36C bust and am a UK size 10-12 and bought the medium. The large is too big everywhere else but fits on the chest. I've noticed a lot of Decathlon tops this year are really tight across the chest and I don't even have a particularly large chest. Decathlon please could you bear in mind some women have larger chests and smaller hips when designing clothes? A lot of women are slim with larger chests. Not every woman has a pear shape. Had to return.


Lovely garment, very good value.

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Great purchase

Bought to keep mother warm it dis the trick.

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Practico cómodo ligero ......

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muy practica.

Ligera, cómoda y cálida. Como prenda auxiliar es perfecta.

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Buen producto

Buen producto y se agradece la explicación y composición del mismo

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Una buena compra

Súper cómodo y calentito

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Es ligero y abriga mucho. Lo he utilizado varias veces con una térmica debajo y no me ha hecho falta nada.

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Una buena compra

Estoy encantada con el chaleco, es muy confortable y se puede llevar incluso debajo de un abrigo cuando hace mucho frío.

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Chaleco negro

Es muy ligero, cómodo y calientito yo lo compré para usarlo cuándo voy al gym, pero lo estoy usando casi a diario , me gusta mucho

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Cómodo y calentito.

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Size Guide

Size Guide Visual

Additional Product Information



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

Main fabric

  • 100% Polyamide

Main lining

  • 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 using 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

XXS: 1.9 oz XS: 2 oz S: 2.2 oz M: 2.5 oz L: 2.6 oz XL: 2.9 oz.

The advantages of a duck down and feather filling

The down jacket can 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

Care instructions for jackets filled with down and feathers

The fabric of this down jacket is water-repellent. It makes drops of water run off the surface, which delays the time it takes for water to get inside the down jacket, giving you time to get out of the rain. The shoulders and hood of the down jacket, which are more exposed to the rain, are waterproof. However, we advise you to wear a waterproof jacket over the down jacket in case of prolonged exposure to rain.

In the event of rain

The fabric of this down jacket is water-repellent. It makes drops of water run off the surface, which delays the time it takes for water to get inside the down jacket, giving you time to get out of the rain. However, we advise you to wear a waterproof jacket over the down jacket in case 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 score from A to E is given 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 the environmental information of its products. For more information:



Product testing

All our gilets are laboratory tested with 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. The best suited to your activity.

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

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual