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Mountain Biking Short-Sleeved Jersey ST 100

Sale price: $12.99 Regular price:
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Sale price: $12.99 Regular price:

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Model: 8530229

Product Features

A photo of the Mountain Biking Short-Sleeved Jersey ST 100 in use

Mountain Biking Short-Sleeved Jersey ST 100 is designed for

The ST 100 MTB jersey is made from material that holds up to riding through brush, has a relaxed fit, and 2 easy-access pockets, including 1 with a zipper for your phone.

Resistant to wild vegetation

It reduces snagging thanks to durable fabric designed for mountain biking.

Freedom of movement

It has a relaxed fit that allows you to sit comfortably on the bike.


This jersey is made from material that provides good ventilation.


2 pockets, 1 with a zip, let you carry keys, bank card, smartphone, tissues etc.

Product Lifestyle Image Gallery

Image Gallery

Mountain Biking Short-Sleeved Jersey ST 100,slate blue 

Mountain Biking Short-Sleeved Jersey ST 100,slate blue 

Mountain Biking Short-Sleeved Jersey ST 100,slate blue 

Mountain Biking Short-Sleeved Jersey ST 100,slate blue

Product Customer Reviews

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291 Reviews
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Mountain Biking Short-Sleeved Jersey ST 100,slate blue
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It has only one pocket and not a very Breathable as it looks

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Very good

Very good n comfortable

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Bright short-sleeved cycle jersey with zip pocket

Bought this for the hot weather this summer for road cycling as I couldn't find a road cycling jersey I liked. The fabric is sweat-absorbing but a little rough on the skin. I also found the pockets inconvenient compared to the 3 pockets usually found on the back of a road jersey. The right-hand zip pocket is however secure for a phone or money. The left-hand pocket is just a small tuck-in pouch for an energy bar, etc. It's useful as a teeshirt with pockets though!

Very useful

Nice one

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Bike Jersey

Love that compact Phone pocket, Size little big for my choose, should I get it S

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Value for money

Go for it!!!

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Cycling t-shirt

Ok product

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Got it on a a discount. Worth it

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Love it!

As always, decathalon provides the best value! Sadly the women's equivalent are sold out at the moment, so I bought a mens small. I use them for trail running as I can't cycle at the moment, but they are great - comfy to wear, very breathable and quick drying, and they've survived running through overgrown brambles etc. Very pleased, just hope the womens version is in stock again soon!

Biking Jersey

Good cloth and nice fitting

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Excellent product

This product is very good I love this

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St100 short sleeved mountain bike jersey

Good value and quality for the price. Zipped pocket is a life saver for house keys/mobile phone. Fits true to size not like the other bike shirts where I need to get 1 size larger.

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Hi Eugene

Thank you very much for sending me your reviews. I'm so glad that you like our product and find it great for value and quality!  

Keep your sharing coming.

Continue sporting and stay fit!

Worry Less Zumba More

Caroline Lee

Front Line Customer Service Adviser & Zumba Diva

Decathlon Joo Koon

Comfortable shirt

Very comfy cycling shirt.

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Size Guide

Size Guide Visual

Additional Product Information


Main fabric

  • 100% Polyester cationic

  • 9% Spandex
  • 91% Polyester cationic

Why pockets?

For carefree riding, plan ahead and keep the essentials to hand: - On your left, there's a pocket with an elasticated flap for carrying all of your personal belongings (bank card, cash, keys, etc.). - On your right, a secure pocket with an easy-to-open zipper (even with gloves on!) so you can access things you need while riding with one hand, such as your phone, tissues, etc.

The cut

This jersey is both sporty and casual with a V-neck and heathered effect. Most of all, it's a real mountain biking jersey! 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.

Resistant to brush?

To allow you to ride along the trails without worrying about branches and leaves, our design team selected a fabric with a tight knit. The result? A real mountain biking jersey that withstands snags when riding through brush, as well as friction from the straps on your hydration backpack. Plus, the material is designed to offer good ventilation!

Tips from our team

When learning to mountain bike, remember to wear a helmet, 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 testing

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.

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.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual