Women’s TREK 100 mountain trekking convertible trousers - dark grey



Made for
You'll never have to choose between trousers and shorts ever again - choose 2-in-1!
Sizes guide

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DurabilityDurable micro-Ripstop fabric that prevents tearing.
Freedom of movementStraight cut. Pre-shaped knees to follow your every move.
Quick dryingA synthetic fabric which provides breathability and is quick-drying.
FlexibilityThe trousers that turn into shorts at your leisure.
WeightLightweight and compressible fabric. Approximately 260 gr in size 40 (M).
BreathabilityLightweight synthetic fabric that allows body heat to escape.
Easy maintenanceMachine washable, does not need ironing.
Waranty2 Years
Technical Information

Convertible section:
Quick tip: Indicators of different colours on each leg allow you to put the left and right lower legs back in place quickly.
Do not forget your over-pants in case of rain.
These trousers are only partially waterproof, in case of heavy rain, think to put on a waterproof trousers.
Sizes:From 36 to 46.
Information / Concept / Technologie
Main fabric : 100.0% Polyamide Pocket : 100.0% Polyester (PES)

You are ready for adventures and treks lasting several days. With these functional pants transformable into shorts, you can chain the hours of walking around the Mont Blanc or on the paths of Santiago de Compostela without problems!


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Good trousers
Used for 2 to 8 weeks
Nice trousers. It may be worth buying a size up from your usual size.
Nice fit.
Used for 3 to 6 months
I love wearing these trousers for walking in. They are light and comfortable.
Nice trousers
Used for 1 week or less
Probably a bit too snug around the hip area and a tiny zip which makes pulling them on and off a bit difficult. Nice light fabric
Walking Trousers
Used for 1 week or less
Bought these for my daughter for a World Challenge Expedition to Borneo. Material is great. Looks amazing on. Converts into long shorts easily.
Great trousers on the slightly small
Used for 1 week or less
I got size 12 as though to get them a bit bigger than my regular size as sometimes need to wear underlayer. Be advised, They just fit perfectly meaning the fit might be smaller than a regular 12 other than that really pleased with them
Fantasitc Buy
Used for More than 2 years
Would really recommend these. Have worn now on 2 Caminos on the way to Santiago.
Compact, breathable, dry quickly, durable. Fits well. Great to be able to convert to shorts and clever colour coded legs!
Zip off trousers
Used for 2 to 8 weeks
Bought these for a recent trip trekking in India. Nice fit and good quality.
Not true to size
Used for 1 week or less
Definitely need a size larger than the size stated on the trousers. They're not at all generous. As such, I would benefit from the XL size that is not currently being offered. It is also a shame that store and online can't match their sizing up as if I had been aware I was ordering L-XL, I would have known to order the larger size as well!
Hated the trousers
Used for 1 week or less
Much too wide at the bottom of the leg
Response of the brand
Hi Alice,

We are sorry to hear about your experience with the Forclaz 100 modular trekking trouser, and we will pass on your feedback to the brand. The reason the trouser is wide at the bottom is because the product is designed to go over your trekking boots. However, if you believe the product is not suitable for your needs then please do not hesitate to return the product to your nearest Decathlon. Or you can return the product via post by following the instructions on the webpage: https://www.decathlon.co.uk/return-order-by-post.html

Alec Stratton-Lake | UK Product Trainer
Lightweight and comfortable
Used for 1 week or less
A nice pair of walking trousers, lightweight, comfortable and quick drying. Very easy to detach and re-attach the lower legs, making a pair of longish shorts.
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