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Men's Mountain Trekking Modular Trousers - TREK100 - Dark Grey

Sale price: 13.500 KD Regular price:
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Size: Select a size
Sale price: 13.500 KD Regular price:
Model: 8317947

Product Videos

Product Features

Men's Mountain Trekking Modular Trousers - TREK100 - Dark Grey : Our team of passionate mountain trekkers has designed these clever trousers that turn into shorts so you can adapt to the weather

These modular trousers also give you unbelievable carrying capacity with their 6 pockets!

A photo of the Men's Mountain Trekking Modular Trousers - TREK100 - Dark Grey in use


Reinforced fabric reduces accelerated wear & tear

Freedom of movement

Semi-elasticated waist to avoid compression anywhere. Preformed knees.

Quick drying

A quick-drying, synthetic fabric which provides breathability.


Trousers turn into shorts using a zip around the thigh.


Lightweight synthetic fabric that lets body heat escape.


Lightweight, compressible fabric. Around 370 g in size 36.

Easy maintenance

Machine-washable synthetic fabric, no ironing required.

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Product Reviews

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3255 reviews

Men's Mountain Trekking Modular Trousers - TREK100 - Dark Grey
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Would be good but too short

Very frustrating that Decathlon couldn't care less for anyone with longer than 34 inch inside leg. Nothing you make fits me length wise and I am only 6 foot 2 which is really not so tall. These are annoyingly too short, the same as all your other trousers. Why not make 36 inside leg like other companies, it really is insulting.

Length issues

These are very comfortable. Dry fast after rain. Light weight. However when ordering online I could not see how I could choose leg length. Being slightly shorter means I need a short leg length. A lot of overhang at the ankles isn’t a major issue but the right length would be better.

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Great For Fishing

Bought for Fishing. Great to have them as short too

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Great for work and play , dry quick , little bit of stretch , ample pockets , hard wearing , great value for money : )

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Would recommend for work gear

As my job entitles for me to be outside for a long period in any weather ( hot or cold) i can rely on these and from many of my customers have had only compliments on how good and professional they look.

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Easy Wearing Zip-Offs

Comfortable and well made. Good value.

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Great trousers

Nice and light to wear

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Baggy bottoms

Very baggy in the legs

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Trek 500 trousers

As described

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This is my 3rd pair and these trousers are great, although I mainly just use them as shorts. Very comfortable, light and quick drying. Loads of pockets which is great just wish the lining of the pockets didn't rip so easily.

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Great fit, versatile trekking trousers

This is my second pair of these trousers. They fit really well, have lots of pockets and can turn into shorts. The material is robust - I have slid down scree in them - and it dries quickly. They are also priced very well.

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Very very small fitting

Brilliant product juatthe size was miles out

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I am glad to see that you love the product. Unfortunately our sizing can be on the small size but if you return the product to your local store, they will be more than happy to exchange it for the right size.

Christopher Penn | UK Product Trainer
Excellent, my second pair

I love travelling light and these trousers allow me to do that and more.

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Used for the three peaks

Comfortable and dry quickly when wet.

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Additional Product informations


Main fabric

  • 100% Polyamide


  • 100% Polyester

Sizing info

Sports cut that offers good freedom of movement.84.7 cm trousers inside leg in size 36 (L)26 cm shorts inside leg in size 36 (L)


2 hand pockets2 cargo pockets with flap1 zipped side pocket1 zipped back pocket

A score for comparing the products' environmental impact

The environmental impact of the product is calculated over its entire life cycle and using various indicators. A score from A to E is given to help you easily identify products with the best environmental performance by comparing products of the same type (t-shirts, trousers, backpacks).Decathlon is committed to displaying the environmental information of its products.Web: sustainability.decathlon.comExplanatory video:

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Size Guide Visual