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Mountain Biking Hydration Backpack 3 L ST 500
Say goodbye to cramp!Go mountain biking for 2 hours with this water bladder:1 L of water and 3 L of bag space.Compact and light for carrying the essentials, including 1 L of water (bladder included).
Free shipping over $49
See our return rules
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San Francisco, 735 Market St. Options
Select an available color and size to see options.
About this item:
- Capacity: 3 L bag with a 1 L bladder for hydration
- Multiple compartments: Large compartments for ample storage space
- Stability: Adjustable straps
- Carrying comfort: Mesh straps and foam padding for excellent comfort
- Use: For hiking, camping, and other outdoor activities
Product Videos
Product Features

Capacity
A usable volume of 3 L and a 1 L water bladder: stay hydrated for 2 hours.
Multiple compartments
1 large pocket, 1 water bladder, 4 small inner pockets and 1 outer pocket
Stability
The straps are adjustable with their parachute-style bindings.
Carrying comfort
Back made of perforated foam and straps made with mesh for ventilation.
Visibility
VIOO CLIP light attachment point on the back
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Product Customer Reviews

I was fed up of using a rucksack with tools, energy bars and a water bottle rattling around every time I went out mountain biking so decided to give this a go. Really glad I did as it's a gem. It's too small if you need to carry lunch or spare clothes, but if you are just out for a quick loop and want to keep things light then absolutely the right option.
Works for running. Feels secure w minimal bounce. Good buy! 👍
Good and has an adequate water tank. Good for mid range rides to carry some food and energy bars if needed.
I have already commented regarding this product review.
Decent pack. Was able to hold 2 water bladders. 4L total.
Well made very comfortable to wear and priced well
Nice balance of price and quality
I love ❤️ this product for every time I am out cycling recreationally
Hello Andrew,
Thank you for taking the time to write to us about your product experience. We truly appreciate your feedback.
We would really appreciate it if you could also drop us a google review, it will help others find out about our store easily: https://g.page/r/CfN9rpYl0dwfEAg/review
Wishing you a fantastic day :)
Thanks & Regards,
Decathlon Brampton Team
Good product just wish it had a 2l bladder as the other bag which was 2 litre was to big
Love the light small size. Completed a 6 hour bike ride and didn’t even notice I was wearing this. It has enough room for the essentials - 2 spare inner tubes, tools, small snack bars and the water bag with enough room for a phone/wallet/car keys.
Purchased this on the spur of the moment. Well pleased, little pockets to hold small items of equipment. Fits snuggley and is comfortable. Easy to get a drink from whilst cycling. Great value for the price, under ÂŁ20.
As with most Decathlon stuff simple well thought out design. No little ports to fill through, the entire top of the bladder is open. Draining and cleaning is easy.
Great backpack and good value
Ordered this bag for a mtb trip as I usually don't ride with a backpack. This is such a great little bag, along with the bladder it's great value for money and more than does the job. Looks very smart!
Very good for long rides plenty of pocket space
Additional Product Information
Composition
Lining: 84.0% Polyester, 16.0% Polyurethane ; Main fabric: 85.0% Polyamide, 15.0% Polyurethane
How do i maintain my water bladder?
We recommend that you rinse out and dry the water bladder after each ride. And to make life easier, use the cleaning kit, which contains bottle brushes and a drying hanger (item code: 5935596). It is important to clean the water bladder and tube.
Bring with you ...
This hydration backpack allows you to store your phone, a pump, an inner tube, tire levers or a repair kit, a multi-tool, a compact rain jacket and a cereal bar. The many pockets will help you keep everything organized in your bag!
Storage instructions
Once clean and dry, keep your backpack and water bladder in a dry place and away from direct sources of heat. Clean by hand in soapy water.
Origin
Imported
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
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Research and development
delivers high-quality cost-effective products
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State-of-the-art production processes
minimize manufacturing costs
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Optimized supply chain
reduces retail prices
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Minimal retail footprint
lowers overhead and indirect costs

Mountain Biking Hydration Backpack 3 L ST 500
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
Weight Thresholds | Shipping within California | Shipping outside of California |
---|---|---|
> 9 lbs | $20.00 | $25.00 |
> 30 lbs | $50.00 | $65.00 |
> 100 lbs | $100.00 | $125.00 |
> 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.
