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Fast Fina 900 Competition Jammer Shorts

Sale price: $20.00 Regular price: $64.99

FINA (International Swimming Federation) approved swimming competition jammers that combine compression, glide and hydrodynamics thanks to AQUARACE technology.

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This product runs small

Sale price: $20.00 Regular price: $64.99

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Final Sale: No returns or exchanges

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8387993

Product Videos

Product Features

A photo of the Fast Fina 900 Competition Jammer Shorts in use

Fast Fina 900 Competition Jammer Shorts | Designed for competitive swimmers. Jammer developed with Fabien Gilot, Olympic Champion and NABAIJI technical partner.

FINA (International Swimming Federation) approved swimming competition jammers that combine compression, glide and hydrodynamics thanks to AQUARACE technology.


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.


The B-FAST JAMMERS fabric is ultra thin and lightweight 5.5 oz/m2

Product Customer Reviews

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83 Reviews
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Fast Fina 900 Competition Jammer Shorts,black
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Great swimmers

Very good swimmers. No chafing and very comfortable

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Surprising quality for the price

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 !

Good item

Little bit tighter and less stretchy than expected but great in the water

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Great Fabric

The fabric may last longer but the length is too long. Sometimes I feel discomfort when doing kick sets.

Not as described

It's stated as FINA approved jammer. But I received mine without any approved logo as shown in advertised photo.

Hi Tan!

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!

Swimming Sports Advisor| Decathlon| Nabaiji| Joo Koon|Singapore
Too Tight

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.

Hi Jubir Farhan,

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!


Swimming Sports Leader
Decathlon Singapore | Joo Koon Store
Schwimm Jammer

Sehr gut die Schwimmhose

Material ist unelastisch, steif und unbrauchbar

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???

Hallo Gerlind,

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] noch einmal melden.

Ich hoffe ich konnte dir weiterhelfen.
Mit sportlichen Grüßen
Echte Empfehlungen für Lange Strecken

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.

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Para competir


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Muy bueno

Por el precio que tenía en rebajas, perfecto. Talla, si es para entrenar, una más.

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Bajada de precio brutal

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.

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Buen bañador aunque un poco caro.

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Size Guide

Size Guide Visual

Additional Product Information


Main fabric: 53.0% Polyamide, 47.0% Spandex ; Lining: 77.0% Polyamide, 23.0% Spandex


JAMMERS – length 17.3 in.The Jammers provide great muscle compression for the quads and glutes, resulting in the perfect fit.


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


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:

Storage instructions

Store the swim shorts in a dry place.



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Size Guide Visual