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Adjustable Men’s Trousers Forclaz 100

Sale price: $10.00 Regular price: $39.99

2-in-1 Pants: Can be made into shorts.

Color: Select a color
Size: Select a size
Size Guide

This product runs small

Sale price: $10.00 Regular price: $39.99

Free shipping over $49

Final Sale: No returns or exchanges

Free returns

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8382966

Product Features

Adjustable Men’s Trousers Forclaz 100 | mountain trekking for multiple days

2-in-1 Pants: Can be made into shorts.

A photo of the Adjustable Men’s Trousers Forclaz 100 in use

Freedom of movement

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

Quick dry

Use of synthetic fabric for breathability and quick drying.


Use of durable Ripstop micro-fabric prevents tearing.


Pants easily transformable into shorts using a zipper.


Lightweight and compressible fabric. approx. 13.1 oz in size XL.


Light synthetic fabric wicks body heat away.


6 pockets of which 4 secure zipper or flap pockets.

Easy to maintain

Synthetic fabric which is machine washable, does not require ironing.

Questions & Answers

Product Customer Reviews

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4222 Reviews
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Adjustable Men’s Trousers Forclaz 100,dark petrol blue
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Quality, Durable, Versatile, Great value

I bought 3 pairs & replaced that section of my wardrobe hoping it would work out. Well... comfortable, quick dry, rip-stop fabric. Wearing these pretty much everywhere. Anything similar from other non-Decathlon stores here in Australia will cost 2 to 3 x more if you can even find an item with all these features. I'm trying hard to think of any design improvements... maybe slightly larger pocket to fit today's larger mobile phone? Even the mesh in the pockets feels robust. I think these will last inspite of the punishment I throw at them daily.

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Good for tracking

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Wrong size delivered (twice)

Ordered online. First time, the wrong size was provided. When I asked about getting it replaced, was sent information about returning the product and getting a refund. Ordered again and the wrong size was delivered. Still waiting on Decathlon following that up.

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Hi Bill,

I am sorry to hear you have received the wrong size (twice). Can I please confirm the AU size you are after please? I will follow up with online to organize the resolution quickly.



Mountain Sports Commercial Director/Buyer - Australia


Exactly as they looked to be; lightweight, fits well, loads of pockets. Thumbs up from me.

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good lightweight pants

Does what it says on the tin

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Hiking pants

Hiking through rough terrain with no tracks and lots of blackberry,full length pants worked well and suffered no damage ,did not try as shorts yet. Pockets were very handy .

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Trekking Trousers

Light Weight, Durable, no colour fade, great value for money

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Terrecking trousers

Sizing small had to return swap size

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Too complicated too many pockets

These pants are too complicated and have too many pockets. Decathlon's MH150 are much better and lighter.

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Best all purpose travel pants

Purchased these in France 2 years ago. Fantastic travel pants for 2 months across Europe. Very well made. Great as shorts or long pants.

Great fit

Love all the pockets. And looks and feels great.

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Very nice


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Hello Stanley,

Thank you for the 5-star review for our mountain trekking pants. We are happy you are satisfied with your purchase with us. :)



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Hello Ashwani,

Thank you for taking the time to leave a review. We are sorry that the product did not fit you perfectly. 

Although we try to accommodate our design and size guides, our customers always advise taking one size up compared to your regular size. 

If you are not satisfied with the product, you can always exchange it at the store for another size. 

Do not hesitate to ask our advisors for advice if you have any doubt about the size you need. It is important to feel comfortable in your clothing! 

Thanks & Regards,

Decathlon Brampton Team

Trekking Trousers

They have an amazing fit, are breathable and look great. Highly recommend this product.

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Hello Karan! 


Thank you for taking the time to write to us about your product experience.


Wishing you a fantastic day :)

Thanks & Regards,

Decathlon Brampton Team

Trekking Pants

Nice fit and comfortable

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Size Guide

Size Guide Visual

Additional Product Information


Main fabric

  • 100% Polyamide


  • 100% Polyester cationic

Sizing info

Sports cut that leaves good freedom of movement. 33.3" pants inside leg in size M 10.2" shorts inside leg in size M


2 hand pockets 2 cargo pockets with flap 1 zipper side pocket 1 back zipper pocket



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.

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    minimize manufacturing costs

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    Minimal retail footprint

    lowers overhead and indirect costs