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900 B-Fast, Swimming Trunks, Men’s
Men's trunk-style swimwear, designed using the best fabric to ensure excellent chlorine-resistance and optimal comfort.
Free returns
Free shipping over $35
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Features

Chlorine resistant
more than 200 hours of use: recommended for regular use.
Stability
Swim trunks provide good support
Adjustable
Easy to adjust around waist using drawstring and a special silicon toggle.
Product Customer Reviews

Perfect tight fit, fabric in good quality. Comfortable to wear in water
The product is good, just that the size chart and actual product do not match
It's great for both running and swimming
Покриха очакванията ми и това което търсих
Здравейте,
Мисията на Декатлон ще остане непроменена - да правим спорта достъпен за възможно най-много хора, по един отговорен към природата начин.
Благодарим Ви, че оценихте нашия продукт!
Спортни поздрави,
Екипът на Декатлон България
Sedí dobře,jen odolnost se prověří sama časem. Byl jsem jen jednou na bazénu.
Moje úplně první zkušenost se slipovými plavkami a jsou skvělé. Skvele se v nich plave. Pevně drží obsah plavek, což je mi příjemné. Jen se špatně šňůrka rozvazuje, když se zamotá, protože je tenoučká.
Ich hatte zwei unterschiedliche Badehosen zur Abholung in der Filiale bestellt, Grösse L bzw. XL laut Decathlon Grössentabelle (gemäss Taillenumfang). Geliefert wurden die Grössen M bzw. M-L. Rücknahme und Erstattung in der Filiale erfolgten anstandslos. Die eine Badehose (Nabaiji 900) war in der Filiale in der passenden Grösse jedoch vorrätig. Qualität, Möglichkeit der Filialabholung, Umtauschmöglichkeit, Hilfsbereitschaft des Personals etc. alles einwandfrei. Aber der Versand einer falschen Grösse und dies gleich doppelt, sollte nicht möglich sein. Dafür ein Stern Abzug.
Schnitt gefiel nicht, ansonsten gut.
hoy en día la gente estamos mas gorditos, y los bañadores XXL es poco, ay que poner tallas grandes, un saludo
Bañador ideal para la práctica de la natación
Great fit, very comfortable. I have used all the other brands but the design and fit of this suit is the best yet!! 🏊♂️
Tejido muy comodo y comfortable.
Muy buena relación calidad precio para la práctica diaria de la natación,aguanta muy bien el cloro ,muy contenta
Ok
Totalmente adaptable y cómodo, buena calidad precio.
Size Guide

Additional Product Information
Composition
Main fabric
- 22% Elastolefin
- 78% Polyester cationic
Lining
- 100% Polyamide
Style
Swimming trunks – side height 3.1" Swimwear should prioritize comfort. It should enable you to move with ease. That is why it is important to choose the shape of your swimwear carefully. The swimming trunks have a classic and timeless cut, providing great freedom of movement, as well as plenty of support. Details are positioned so that they mold to your body shape.
Material
22%- Elastolefin 78% - Polyester Our engineers have developed a polyester-based fabric and replaced the spandex fibers with fibers that give it sufficient elasticity to ensure user comfort while protecting it against the damaging effects of chlorine. This thread also offers the following benefits: - quick drying. - only loses 3 to 4% resistance throughout its lifespan. - UV-resistance: Colors are more stable.
Aquaresist technology
Products bearing the AQUARESIST label are guaranteed to deliver chlorine-resistance throughout their lifespan. They will keep their elasticity and be resistant to light. For these reasons, they are recommended for regular or intensive pool use.
Determining the environmental impact of our products
The environmental impact of the product is calculated over its entire lifecycle using different indicators. An ABCDE score is provided to enable easy identification of the most environmentally-friendly products when comparing products of the same type (T-shirts, pants, backpacks). Decathlon chose to apply this voluntary environmental labeling system. Web: Sustainability.decathlon.com Video: https://youtu.be/8t63KkRwn_8
Origin
Imported
Product testing
Products labeled with AQUARESIST certification are tested under repeated cyclical loading in a pool of chlorinated water for more than 200 hours. No deterioration of elastic strength was observed throughout the test. Unlike a standard swimming product, the product remains intact.
Storage instructions
Store the swim shorts in a dry place.
Guarantee
2
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
-
Research and development
delivers high-quality cost-effective products
-
State-of-the-art production processes
minimize manufacturing costs
-
Optimized supply chain
reduces retail prices
-
Minimal retail footprint
lowers overhead and indirect costs

900 B-Fast, Swimming Trunks, Men’s
Your location: City, ST
Please enter a valid city with state or zipcode. Example: San Francisco, CA or 94101
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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.
