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Nabaiji B-First, Swim Jammers, Men's

Sale price: $20.00 Regular price: $34.99

The FITI JAMMER 500 men's swimsuit is perfect for fitness and cardio training. It stays in place no matter how hard you push, allowing you to achieve your goals.

Color: Select a color
Size: Select a size
Size Guide

This product runs small

Sale price: $20.00 Regular price: $34.99

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.

Model: 8361408

Product Videos

Product Features

A photo of the Nabaiji B-First, Swim Jammers, Men's in use

Nabaiji B-First, Swim Jammers, Men's | Designed for intermediate swimmers looking for a modern, versatile jammer that stays perfectly in place and lets them train and achieve their athletic goals.

The FITI JAMMER 500 men's swimsuit is perfect for fitness and cardio training. It stays in place no matter how hard you push, allowing you to achieve your goals.

Chlorine resistant

more than 200 hours of use


The spandex-free elastic fabric offers good support.

Freedom of movement

Press flat against the skin and allow the swimmer to move without difficulty.


Easy-to-adjust drawstring waist.


Increased buoyancy thanks to the tight material with greater coverage + stretch

Product Lifestyle Image Gallery

Image Gallery

Nabaiji B-First, Swim Jammers, Men's,black 

Nabaiji B-First, Swim Jammers, Men's,black

Product Customer Reviews

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Nabaiji B-First, Swim Jammers, Men's,black
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Too baggie in leg bottoms

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Comfortable Swimwear

Feel good materials and comfy styles. All in all, your styles and prices are excellent.

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Happy with the buy

Good quality product

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Good price, good Quality but wish this more choices with good prices!

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Its excellent product and fair price as well

Its excellent product and great value

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Comfortable ,fit perfectly , quick dry

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Fit for purpose

Product does what it is supposed to

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Size misleading

The size on the label was in no indicative of the actual size. No size chart visiable

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mens swimming jammers

fits well, looks well made, time will tell how long it lasts with chlorine exposure

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Great swimmers!

Excellent construction, materials are great and the finishing is great.. no loose threads or puckered up stitching.

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Hi Maria

Thank you for your review and we are glad to hear that you are delighted with the product! We take feedbacks and reviews into consideration as we strive to make better products for all sports users out there!

This product is meant for intermediate users who seeks comfort while swimming as it allows you to swim without difficulty :)

Feel free to view our website for more products or drop by to our nearest Decathlon store to you to check out more sports products catered for sports users!

Muhammad Fakhrul

Omni-Channel Sports Advisor

Decathlon Singapore



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Perfect fit

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Hello Mohan,

Thank you for your review on our product.

We are glad they fit you well. I hope you are enjoying.

Have a great day :)

Thanks & Regards,

Decathlon Brampton Team

Great to have Decathlon nearby!

Restarted to swim with a TYR shorts from Amazon, which didn't last two months. So far I'm happy with this purchase, excellent quality product for daily swimmers.

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Does the job

Sizing is very good, you'll find one that fits well without pinching. Otherwise, just your basic jammers. I liked the first pair so much, I went to buy a second one. I'm satisfied, but colors are boring. Colors helps your family to recognize you at practice or competition. Only black and blue, black and orange. boring.

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Size Guide

Size Guide Visual

Additional Product Information


Main fabric

  • 100% Polyester cationic


  • 100% Polyamide


JAMMER – 17.3" long The JAMMER is ideal for anyone who wants to surpass themselves. A swimsuit should primarily favor comfort. It should enable you to move with ease. That's why it is important to choose the cut of your swimwear carefully.


Our engineers have developed a Polyester-based textile and replaced the spandex fibers with PBT fibers that give it sufficient elasticity to ensure user comfort while protecting it against the damaging effects of chlorine. The benefits of this PBT thread are - quick-drying. - only loses 3 to 4% resistance throughout its lifespan. - Even the brightest of colors will retain their colorfastness.

Aquaresist technology

Products bearing the AQUARESIST label are guaranteed to deliver chlorine-resistance throughout their lifespan. They will maintain their elasticity and are UV-resistant. For these reasons, they are recommended for regular or intensive pool use.

A rating for comparing products environmental impact

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. Web: Video:

Score to compare the environmental impact of products

The environmental impact of the product is calculated with different indicators over its entire lifecycle. An overall score (ABCDE) is attributed to help you easily identify the products with the best environmental performance. Use the score to compare products of the same type with one another (T-shirts, pants, backpacks, etc.). Decathlon chose to apply this environmental labeling system. Explanatory video:



Product testing

The products labeled with AQUARESIST certification are tested under repeated cyclical loading in a pool of chlorinated water for 240 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.

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