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500 Swim Jammers Boy's

Sale price: $10.00 Regular price: $19.99

The FITI BOXER 500 boy'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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Size: Select a size
Size Guide

This product runs small

Sale price: $10.00 Regular price: $19.99

Free shipping over $49

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: 8542211

Product Videos

Product Features

A photo of the 500 Swim Jammers Boy's in use

500 Swim Jammers Boy's | Designed for intermediate swimmers looking for a simple, versatile boxer that stays perfectly in place and lets them train and achieve their athletic goals.

The FITI BOXER 500 boy'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


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

Freedom of movement

Good support thanks to the spandex-free elastic fabric.


Easy to adjust fit around waist thanks to the drawstring.

Questions & Answers

Product Customer Reviews

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500 Swim Jammers Boy's,black
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Great swimmers

These shorts were a great length and love the design. The price is great too. I did find them a little small fitting, there is not much stretch in them, so I gave them to my nearly 7 year old instead

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Great fit

My son loved these shorts, perfect length and size and has a drawstring. Material has a little give in it too which is great

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Boys Jammers

I have a squad swimmer so his bathers get well, well used. These were a fantastic price, great quality, they look great and he absolutely loves them. Will definately be getting more on my next visit to Decathlon

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Great fit and design kids loved them

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Sizing runs small!

Ordered a size 12 for my long and skinny 10 year old. Far, far too small. Such a shame. Hope to exchange for a larger size as he really liked them otherwise.

Great jammers but small

They're ideal for my son for swimming club, but had to get a bigger size as run very small.

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Just super

Superb quality and fit.

Worth every penny.

Easy to use and clean. Will recommend to all.

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Quality product

Item worth every penny. Easy to use and clean. Will recommend to all.

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Good value

These are made from quality material at a very good price. But take note: they come up quite small. I bought age 14 for my 12 year old son, who is not skinny but is slim. They are a bit of a squeeze for him to get on and won’t last him for long.

Great value for money

Great quality product. Just what we were looking for.

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Hi Natalie,

Thanks for your review! We are pleased you are happy with the price and quality of our product! Hopefully see you again soon.


good quality

excellent price

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great quality

excellent value

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Very good quality good fit

Very good swim shorts good quality

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great for the money

although they tend to come up small these are great value and have been perfect for the keen swimmer!

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Size Guide

Size Guide Visual

Additional Product Information


Main fabric: 100.0% Polyethylene Terephtalate ; Main lining: 100.0% Polyamide


JAMMER – 13” long (in size 10 years)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.


Swimwear intended for regular use.

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 score (ABCDE) is attributed to help you easily identify the products with the best environmental performance by comparing products of the same type with one another (T-shirts, pants, backpacks, etc.).Decathlon chose to apply this voluntary environmental labeling system.Website: sustainability.decathlon.comExplanatory 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, this product retains its shape.

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
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    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


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