All-Mountain MTB Bottoms


These trousers are designed for All mountain/MTB rides in cool weather.

Developed using stretch material to allow full freedom of movement when riding hard and descending fast on technical trails, they boast cleverly placed waterproof material in all the right places.

Color: Charcoal grey
Size: size guide


Product benefits

Abrasion resistance

Experience a brush with nature! The light fabric won't get snagged or worn.

Water repellent

Drizzle slides over the fabric's surface, while mud struggles to stick.

Freedom of movement

The fluid, stretchy fabric contains elastane to follow your leg movements


Compatible with our mountain biking protective pads and undershorts.


Two zip pockets (one for your phone and a multi-purpose one)


Vents on the groin and behind the knees


330 g in size L.

Technical information


Rear and shins:triple-layered waterproof membrane fabric.
On the thighs and waist: breathable stretchy fabric. Thanks to this fabric, the bottoms are lighter and dry more quickly.


Water-repellent fabric allows water to slide over its surface and delays absorption.
This means that the fabric doesn't become waterlogged, but stays light.

Water repellency is obtained by applying a treatment to the fabric's outer surface.
HOW DO YOU PRESERVE WATER REPELLENCY?The water-repellent treatment applied to the fabric's outer surface needs to be reactivated throughout the product's life. Our advice: regularly apply a fabric waterproofing liquid (or spray)


Fitted cut: they are closer-fitting at the waist. The stretchy fabric guarantees ease of movement. Wider on the thighs and knees so you can wear both undershorts and knee pads. They are tighter at the ankle to avoid getting in the way of your pedalling.


You can find detailed info on looking after your mountain bike clothing on our website

Product tests

Our team of product designers based at the B'Twin Village in Lille is continuously working to make cycling more comfortable for our users.
Our obsession is to create products that meet the specific cycling needs of our users and eliminate things that get in the way of their rides.

A rating to compare products' environmental impact.

A product's environmental impact is calculated for its entire life cycle using various indicators.
An overall rating (ABCDE) is given, allowing you to easily identify products with the best environmental performance by comparing similar products to each other (T-shirts, trousers, backpacks etc.).

Decathlon openly displays the environmental ratings of its products.
To find out more:


2 years

Product concept & technology

Product Composition

Main fabric 88% Polyester, 12% Elasthane Yoke 100% Polyester Membrane 100% Polyurethane Pocket 83% Polyamide, 17% Elasthane


Store in a dry place.

Approved By

All of our mountain bike equipment has been tested in the field by mountain bikers just like you. We also perform lab tests. This dual testing method is an exhaustive, demanding way of creating and constantly improving the technical features and design of our Rockrider products. We also take your feedback into account to constantly update our products.

Maintenance advice

Machine wash - 30° max - normal

Do not bleach

Do not tumble dry

Do not iron

Do not dry-clean


All-Mountain MTB Bottoms
All-Mountain MTB Bottoms
All-Mountain MTB Bottoms

Customer reviews


Environmental Impact

The carbon footprint of this product is:
55.44 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: B
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