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Nabaiji B-First, Swim Jammers, Men's

Sale price: $29.99 Regular price:

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.

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This product runs small

Sale price: $29.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8361408

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Product Features

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

Nabaiji B-First, Swim Jammers, Men's is designed for 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

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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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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

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.


I found these after seeing someone wearing jamners on holiday that came from Decathlon. Unfortunately they were discontinued but these are equally as stylish, comfortable and dow the job. Great value for money. I'd still fancy some of the others too.

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Decent swimming trunks

Have other jammers from Decathlon on the strength of the quality and fit I bought these and have no regrets (Edith Piaf starts to sing) I’ve got pair of Speedo’s and they don’t come anywhere near these bad boys. I will be buying more in the future and only from Decathlon for certain.

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Great swimming gear

Bought these as swimming regularly and needed some extra shorts whilst the others dried. Far superior quality to the more expensive speedo jammers I bought recently and seem to add to buoyancy when I swim distance. I will definitely buy again.

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First time jammer

Bought these as I noticed a lot of the top swimmers wearing them and as I used to compete myself and didn’t want to offend the world with me in a pair of budgie smugglers t tried and love these trunks. I’ve ordered some more as the quality of them leave my speedo’s For dead in comparison a very good buy indeed

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Good for my 10 y old boy

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HI  您好






Great Jammer

Excellent swim wear for my use - 3 swims a week about 3k each swim.

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Reasonable quality and long lasting.

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Good Fit, Great Value. Well Worth a look.

I bought these as I'm learning front crawl, and I must say that they seem so much better that loose "leisure shorts". It feels like I've ditched a parachute now. Sizing was as expected and the length is good. Comfort is good with no rubbing or pressure points.

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Great fit for my son he was over the moon.

Make sure they are a tight fit as they jammers always loosen up slightly when wet.

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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

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual