Men’s sturdy mountain trekking trousers - MT500


Our designers, themselves mountain trekking enthusiasts, have designed these resistant trousers so you can trek for as long as possible.

Thanks to their hybrid construction using two types of fabric, these trekking trousers are comfortable and lightweight They are practical and dry quickly. You won't be able to do without them!

Color: Whale grey / Asphalt blue / Carbon grey
Size: size guide


Eco designed

Learn more about Eco-Designed Products.

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Product benefits


Durable fabric inserts. Ultra-durable COATS yarn for the assemblies

Freedom of movement

Stretch fabric at the seat, knees and lower legs

Quick drying

Synthetic fabric used for its quick-drying properties

Water repellent

The front and rear reinforcement zones are water-repellent


Light, breathable fabric used in areas with low friction


5 secure pockets including 4 with a zip and 1 with a flap and press studs


These trousers weigh about 410g in size 44 (L)


Dope dyeing process that reduces water consumption

Technical information

How are the blue, black and brown models eco-designed?

For the three colour versions of the trousers (blue, black and brown), we used a bulk-dyeing process called "dope dyeing".
This process incorporates the colour pigments from the initial thread manufacture to reduce water consumption.
As a result, we reduced the carbon emissions by 27.8% for the black version and by 11.8% for blue and brown versions.

Hybrid structure

Trousers designed with 2 different components:

- a durable fabric (207 g/m²) on the areas that need protection from abrasion (seat, bottom of the legs at the front). This fabric also has stretch properties. This gives you plenty of freedom of movement.
- a lightweight and breathable fabric (125 g/m²) on the rest of the trousers.


2 zipped hand pockets
1 zipped pocket on the right thigh with 1 phone compartment
1 pocket with a flap on the left thigh
1 zipped back pocket
Elastic tightening system at the hems so that the trousers fit perfectly over the boot
Trousers sold with a belt

What is the water repellent feature of the component?

These trousers have water repellent inserts (bottom of the legs at the front, seat) that make water run off the surface of the fabric.Please note, this does not mean WATERPROOF.
The water repellent property prevents the trousers from getting wet too fast but will not keep you dry under steady rain.To do this, you will need a pair of over-trousers like the MT500 model (ref.8493660).
The water-repellent properties can be restored by warming the trousers in a tumble dryer at low heat for 10 minutes

Sizing information

Regular cut and use of stretch fabric in the right areas guarantees high comfort levels when moving around.
Choose your usual size.

Inside leg 83.7 cm in size 44 (L)
Width of trousers hem: 21.3 cm in size 44 (L)

A score for comparing products' environmental impact

The environmental impact of the product is calculated based on its entire life cycle and using different indicators. An overall ABCDE score is given to help you easily identify products with the best environmental performance by comparing products of the same type (T-shirts, trousers, rucksacks, etc...). Decathlon is a voluntary supporter of this environmentally-friendly labelling approach. For more info:


2 years


UK29" FR38 (L33) : 0.378 kg
UK31" FR40 (L33) : 0.39 kg
UK32" FR42 (L33) : 0.398 kg
UK34" FR44 (L34) : 0.406 kg
UK36" FR46 (L34) : 0.408 kg
UK39" FR48 (L34) : 0.416 kg
UK41" FR50 (L34) : 0.456 kg
UK43" FR52 (L34) : 0.462 kg

Product concept & technology

Product Composition

Main fabric 100% Polyamide Yoke 88% Polyamide, 12% Elasthane Lining 100% Polyester


These trousers have been field-tested in real conditions. They were worn for 5 weeks by several testers independent from Decathlon who undertook the Grande Traversée des Alpes (GTA) in late spring 2017.

Approved By

These trousers were approved by our customers, and their reviews were also used to make the following improvements:
- addition of a zipped back pocket
- inversion of the right and left pockets
- more durable yarn used in the assemblies
- double stitching on the back crotch

Maintenance advice

Machine wash - 30° max - normal

Do not bleach

Do not tumble dry

Do not iron

Do not dry-clean


Men’s sturdy mountain trekking trousers - MT500
Men’s sturdy mountain trekking trousers - MT500
Men’s sturdy mountain trekking trousers - MT500
Men’s sturdy mountain trekking trousers - MT500
Men’s sturdy mountain trekking trousers - MT500
Men’s sturdy mountain trekking trousers - MT500


Customer reviews


Environmental Impact

The carbon footprint of this product is:
18.4 kg CO2e
1 kg of CO2e represents 5km in a petrol car (according to the Base Carbone© of ADEME)
What's the carbon footprint ? We evaluate the environmental impact of all our products. At all stages of their life cycle: from the extraction of the raw material, passing through transport to the plant which transforms them, the transformation, the manufacture, the transport of the finished product, until its use and end of life. Find out more
The environmental note of this product is: D
What is the environmental note? Overall environmental score for this product in comparison to others in the same category. It is calculated based on its impact on the environment (air and water emissions, greenhouse gas emissions, depletion of natural resources) at each stage of its life cycle, according to a system managed by ADEME. Find out more