Long-Sleeved Mountain Biking Jersey ST 100 - Grey


This short-sleeved jersey is designed for your first mountain bike rides in warm weather. Compact, regular cut and durable material on the sleeves.

Ride through the undergrowth with no worries this summer. This breathable jersey is the perfect size to let you move freely. 1 secure pocket at the back.

Color: Pale grey / BLACK
Size: size guide


Eco designed

Learn more about Eco-Designed Products.

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Product benefits

Abrasion resistance

Experience a brush with nature! The tightly woven fabric withstands abrasion.

Freedom of movement

Regular cut designed for mountain biking to give you better freedom of movement

Moisture management

Stay dry throughout your ride thanks to our breathable fabric

Compact design

Packs away into its zipped rear pocket


Zip pocket in the back for carrying small items (tissue, etc.)


Lightweight and comfortable to wear. 170 g in size L.


Main fabric 100% recycled PES, sleeves 86% recycled PES.

Technical information


Our design team selected a fabric with a tight weave to allow you to ride along the trails without worrying about branches and leaves.
The result? A real mountain biking jersey that resists both vegetation and rubbing from the straps of your hydration backpack.
Plus, the material is designed to offer good ventilation!


This MTB jersey is both sporty and relaxed!
The cut and seams were designed to prevent friction and to keep you as comfortable as possible while in a riding position.
For example, the jersey is long enough in the back to keep your entire back covered, even when leaning over your handlebar.


For carefree riding, plan ahead and keep the essentials to hand:
- On your right, a secure pocket (16 x 11 cm) with an easy-to-open zip (even with gloves on!) so you can access things you need while riding with one hand, such as your tissues, tyre levers, etc.
- The jersey material is very extensible; we recommend using it for lightweight items.
- You can pack the jersey down into this pocket, for easy transportation and storage.

Packed Size

Length: 16 cm
Width: 10cm Height: 5cm


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


Think about wearing a helmet and gloves when you start mountain biking: not just for falls, but also to protect yourself from low branches! For comfort, wear a pair of shorts with a pad to prevent chaffing. A water bottle or hydration backpack will keep you hydrated. And finally, puncture repair spray so you can finish your ride without having to fiddle with repair tools.

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: http://sustainability.decathlon.com/


2 years

Product concept & technology

Product Composition

Main fabric 100% Polyester Sleeve fabric 86% Polyester, 14% Elasthane Rib fabric 91% Polyester, 9% Elasthane


Store in a clean and dry place.


Our engineers always have real riders test all our products in real conditions. These tests round out our lab tests and let us validate all our products before they hit store shelves.

Maintenance advice

Machine wash - 30° max - normal

Do not bleach

Do not tumble dry

Do not iron

Do not dry-clean


Long-Sleeved Mountain Biking Jersey ST 100 - Grey
Long-Sleeved Mountain Biking Jersey ST 100 - Grey
Long-Sleeved Mountain Biking Jersey ST 100 - Grey

Customer reviews


Environmental Impact

The carbon footprint of this product is:
6.65 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