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Fast Fina 900 Competition Jammer Shorts
FINA (International Swimming Federation) approved swimming competition jammers that combine compression, glide and hydrodynamics thanks to AQUARACE technology.
Free shipping over $35
Final Sale: No returns or exchanges
Free returns
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Videos
Product Features

Hydrodynamics
AQUARACE technology reduces body drag resistance in water.
Glide performance
Water-repellent fabric absorbs virtually no water and guarantees a perfect glide
Muscle support
Excellent muscle compression at the quads and glutes.
Lightweight
The B-FAST JAMMERS fabric is ultra thin and lightweight 5.5 oz/m2
Product Customer Reviews

Very good swimmers. No chafing and very comfortable
Knoing that these were Racing jammers I expected them to be tight fitting, and they are indeed very tight, but that compression and low profile makes them excellent in the water. I noticed a direct improvement in bouyancy, lack of drag and overall speed, combined with reduced fatigue. These make me want to get back in the water straight away !
Little bit tighter and less stretchy than expected but great in the water
The fabric may last longer but the length is too long. Sometimes I feel discomfort when doing kick sets.
It's stated as FINA approved jammer. But I received mine without any approved logo as shown in advertised photo.
Thank you for your review for the FINA 900 FAST MEN'S COMPETITION JAMMER SHORTS- BLACK ORANGE.
I sincerely apologize for the issue that you faced in the review stated above. However, the product that you bought is indeed FINA approved. This is supported with the official FINA QR code printed on each and every piece of the swimsuit sold in all stores. Each QR code is unique and is defferent for other pieces. You may scan it with your smartphone camera to verify it's authenticity.
Have a good day Tan!
#Swimwithpassion
Azhimy
Swimming Sports Advisor| Decathlon| Nabaiji| Joo Koon|Singapore
I'm a size 33-34 for all my pants however bought a size UK36 and it was extremely tight in all the places. Will not recommend for slighly curvier men.
Thank you for leaving a review on our product, FINA 900 FAST MEN'S COMPETITION JAMMER SHORTS - BLACK ORANGE (8387993).
I apologize if the product did not match up to your expectations. Just to share with you, this swim jammers for men is designed for body-fit, which should feel like a second skin while supporting your muscles. It is meant for competition use and not for training, which is the reason why it has a tighter fit as compared to the usual swim jammers.
I would like to recommend you another pair of swimming jammers which would be better suited for your needs. This swim jammers has a body hugging design which is more comfortable as compared to the competition jammers. It is also able to withstand up to 200 hours in chlorine water while maintaining muscle support. This model also comes in plenty more sizes as compared to the competition jammers. For your reference, it can be found on our website here.
If you need any further advice or assistance regarding our products, please feel free to drop by Joo Koon Store or reply to my email.
Once again, thanks for your review and hope to see you again at Decathlon soon!
Sportingly,
Crystal
Swimming Sports Leader
Decathlon Singapore | Joo Koon Store
Sehr gut die Schwimmhose
Ich habe die Hose in Gr. M +XS für die Schwimmwettkämpfe meiner Jungs (10+14 Jahre) bestellt. Beide sind sehr schlank. Das Material ist unelastisch und steif. Der 14-jährige hatte keine Chance in die Hose rein zukommen. Der 10-jährige hat dann die Hose, die für seinen Bruder bestimmt war, angezogen. Es war eine einzige Katastrophe. Wie soll ein Mann in diese Herrenhose passen?????.... wenn es einem Kind nicht gelingt???
vielen Dank, dass du dir die Zeit genommen hast, das Produkt FINA 900 Fast Men's Competition zu bewerten.
Schade, dass die Passform nicht zu deiner Zufriedenheit ist.
Es ist richtig, dass das Material sehr steif und unelastisch ist. Dies bringt eine hohe Muskelkompression in den Oberschenkeln und die Oberfläche verhilft zu mehr Hydrodynamik. Wir arbeiten bereits an der Anpassung der Größen, da wir das Feedback bereits öfter bekommen haben. Wir stehen im ständigen Austausch mit unseren Eigenmarken um unsere Produkte stetig zu verbessern.
Mit deinem Kundenkonto kannst du deine Produkte innerhalb von 30 Tagen auch nach Benutzung in einer Filiale oder online umtauschen. Solltest du dazu Fragen haben, kannst du dich gern unter service[at]decathlon.de noch einmal melden.
Ich hoffe ich konnte dir weiterhelfen.
Mit sportlichen Grüßen
Pia
Team DECATHLON
Typische "Race Skin" die allerdings nicht ganz so einschneidet an den Nähten am Bund und unten an den Beinen. Vor allem bei stärkerer Beinmuskulatur schneiden die getappten Jammer schon mal. Der Jammer ist sehr komfortabel und hat eine angenehme und moderate Kompression. Das ist über längere Distanzen 10Km+ sehr angenehm. Er lässt sich auch nass wieder über die Hüfte ziehen. Die Beinlänge und Gösse stimmen mit der Beschreibung überein. Also genau auswählen. Der einzige "Schönheitsfehler" ist, das sich der Aufdruck am Bein sehr schnell "auflöst". Hier solltet Decathlon einfach auf den Aufdruck verzichten. Das Fina logo hält aber.
Contentisimo
Por el precio que tenía en rebajas, perfecto. Talla, si es para entrenar, una más.
Lo recomiendo y más a este precio, mi pena fue que yo lo compre justo a más del doble de ese precio hace apenas unos meses.
Genial
Buen bañador aunque un poco caro.
Inmejorable
Size Guide

Additional Product Information
Composition
Main fabric: 53.0% Polyamide, 47.0% Spandex ; Lining: 77.0% Polyamide, 23.0% Spandex
Style
JAMMERS – length 17.3 in.The Jammers provide great muscle compression for the quads and glutes, resulting in the perfect fit.
Material
AQUARACE material is ultra-thin and lightweight thanks to high percentage of spandex, while remaining highly tear-resistant. Moreover its thinness and water repellency enable ultra quick drying after swimming. In fact the water repellent fabric absorbs virtually no water and actually blocks it on the outer surface, creating micro bubbles that assist with buoyancy
Fina-approved
The B-FAST Jammers are FINA (International Swimming Federation) approved competition swimwear.
Aquarace technology
The swimsuits and jammers benefiting from AQUARACE technology are designed for competitive swimmers. to enhance performance by incorporating superior hydrodynamics, increased buoyancy as well as fatigue reduction during physical exercise.
Muscle compression
Component provides good compression with its high spandex content and very good springback.The position of the red reinforcement stripes provides more compression at belt and leg level.Thanks to a scientific cut and a muscle compressing material, the drag coefficient of the water is increased and blood flow optimizes energy expenditure, which helps regulate fatigue
Score to compare the environmental impact of products
The environmental impact of the product is calculated over its entire lifecycle and with different indicators. An overall ABCDE rating is performed to help you easily identify the products with the best environmental performance by comparing the same type of products with each other (T-shirts, pants, backpacks).Decathlon is a committed stakeholder in this environmental labeling approach.Website: sustainability.decathlon.comExplanatory video: https://youtu.be/8t63KkRwn_8
Storage instructions
Store the swim shorts in a dry place.
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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lowers overhead and indirect costs

Fast Fina 900 Competition Jammer Shorts
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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.
