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Aptonia SD, Short-Distance Triathlon Trisuit, Women's

Sale price: $30.00 Regular price: $49.99

Swim, cycle, and run with this trisuit! Designed by triathletes, this 2nd skin follows the movements of your body during the 3 disciplines of your short-distance triathlons.

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Sale price: $30.00 Regular price: $49.99

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8577745

Product Videos

Product Features

Aptonia SD, Short-Distance Triathlon Trisuit, Women's | Our team of passionate triathletes developed this trisuit, an iconic staple for your 1st short-distance triathlons.

Swim, cycle, and run with this trisuit! Designed by triathletes, this 2nd skin follows the movements of your body during the 3 disciplines of your short-distance triathlons.

A photo of the Aptonia SD, Short-Distance Triathlon Trisuit, Women's in use

Quick dry

The trisuit material dries quickly so you don't stay wet while you cycle!

Seat comfort

The flexible perforated foam does not get waterlogged and is ideal for cycling.

Moisture wicking

The spine is covered in mesh at areas of profuse sweating.

Freedom of movement

The absence of sleeves fosters freedom of movement.


The front zipper goes down to the navel to allow ventilation.

Irritation reduction

All the threads used for the seams are made of very soft foam.

Questions & Answers

Product Customer Reviews

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129 Reviews
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Aptonia SD, Short-Distance Triathlon Trisuit, Women's
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completely see through at the front

Purchased for my Wife - Good product overall in terms of fit and comfort however a fatal flaw for this suit is that it is totally see through at the front - much to the horror for my wife it's also recommended not to wear underwear while using therefore the product was unusable. I gave 2 stars as the padding is good and the fit was good, secure zip and the material at the back was good. The front was totally see through. I had also purchased the mens version and wore it without checking and we discovered afterwards that it was also see through in the same areas

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Great product but check sizing

I originally brought this in a large due to my chest size being on the boarder of medium and large. However the legs on a large were huge. I'm 5ft 8 athletic build and legs were massive. But top fitted perfectly. I couldn't even try it in the pool or cycle etc with it on as I knew the legs would ride up due to massive gaps. I did however purchase again in a medium fits alot better in the legs. Top half ok not perfect as I have broad shoulders but I can still move jumped up and down, star jumps stretches and ran on the spot in the changing room to check it fits. Will be using for my first triathlon this year. And if I decide triathlon is not for me I can still keep it to wear in the pool. 100% going to wear a sports bra underneath it.

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Women's Short-Distance SD Triathlon Trisuit

We were told these came up small so I ordered a M for my daughter and a L for me. My daughter is a size 8 and I am a size 10. The L was too big and I had to send it back for a M but my daughter was happy with the M. So if you are 8 - 10 then go for a M. They are stretchy, surprisingly comfortable but there is not any bust support so wear your usual sports bra underneath.

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Great Tri Suit

Purchased this Tri suit for sprint triathlon. Very pleased with it. Great size. Feels very comfortable.

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Odd sizing

I ordered medium, and it fits perfectly on the top (tight & supportive with a sports bra underneath - I wouldn't go down a size!) but way too big on the legs (and I don't have thin legs). It doesn't grip to my thighs so bunches up when I cycle becoming increasingly uncomfortable over time, so I won't be able to wear it for my event. Be careful when trying on, and try moving around in it lots before committing - I didn't realise the issues were so bad until actually riding in it unfortunately! It seems good quality other than the sizing issues, I'm disappointed that it's not suitable for me!

Triathlon trisuit

Unfortunately there is no hook and eye, at the top of the zip, and so the zip can easily open , so I have to pin the top of it, that seems to work and hold it fastened

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Wear everyday for sea swimming great as allows free movement unlike a wet suit, easy to get on and off great peice of kit

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Happy with the quality

Fit true size . Good quality

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Dear Beatrice,greetings from Decathlon! Firstly, thank you so much for sharing your kind words and great review with us. It means the world to us and to our entire team! We work hard to meet expectations like yours, and we’re happy to hear we hit the mark for you.Stay loyal to Decathlon and please let us know if there is anything else we can improve on in the future. We are very grateful for customers like you and hope you stick with us for years to come. Thank you once again for your time and we hope to serve you again soon!

Muhammad Aqkil

Удобен костюм

Размерът, предложен от Декатлон, беше с един номер по- голям от този, който ми пасваше .

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Pekna barva, dobry strih, pohodli. Predchozi model z doby pred 4 lety mel na boku prusvitnejsi material, coz zde neni a je to tak lepsi :)

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Guter Trainingsanzug. Eher grösser bemessen.

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Sitz sehr gut, gute Qualität, perfekt für den Preis

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Size Guide

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Additional Product Information


Main fabric

  • 20% Spandex
  • 80% Polyester cationic


  • 22% Spandex
  • 78% Polyester cationic

Back fabric

  • 14% Spandex
  • 86% Polyester cationic


  • 100% Foamed polyurethane


  • 23% Spandex
  • 77% Polyester cationic


  • 100% Polyester cationic
  • 82% Polyester cationic

Padding - Outer fabric

  • 18% Spandex
  • 82% Polyester cationic

The trisuit = a 3-in-1 product!

The trisuit is an iconic accessory for triathletes and a staple for triathlons: - For swimming, its fabric is similar to that of a swimsuit, and its foam BRA is perforated, so it doesn't get waterlogged. - For cycling, the foam BRA improves sitting comfort. The trisuit acts like cycling shorts, to be worn without underwear. - For running, its fine BRA provides comfort and low weight. All you have to focus on is crossing the finish line.

Dry quickly!

The fabric that this trisuit is made from allows super fast drying during your swimming/cycling transitions so that you don't stay wet while you cycle. And, yes, you can swim with your trisuit on under your neoprene suit to save time during this transition! We also used a large mesh band to wick away perspiration where sweating is profuse: at the spine.

The small details that change everything!

- This trisuit has a silicone strip at the thighs, so that the bottom doesn't move during use or when putting on a neoprene suit for the swimming leg. - A front zipper going down to the navel allows you to ventilate during the race and ensures quick dressing! Plus, this zipper has an internal protection strip to avoid friction. - Finally, the armpits do not come into contact with the fabric, so they do not chafe.

A trisuit adapted to your body shape!

This trisuit was designed to mold to women's body features. Overall, the fabric used for this trisuit is more lightweight on the top and has slightly more support on the bottom. It provides all the support and comfort you need for natural movement, without compressing. The internal foam perfectly molds to your female body shape.

A product designed to carry nutrition.

To get to the finish line of a short-distance triathlon (1 to 3 hours of exertion), you need to eat! This trisuit has an easily accessible pocket on the right thigh: no need to fumble in your pockets blindly to reach for fuel — you can see everything! This pocket can hold up to 2 bars and/or gel products and is thermoformed: You won't feel it as it's seamless and zipper-free, plus the products it holds are under tension and don't move.

Trisuit, triathlon suit, triathlon trisuit... what's the difference?

None! It's the same type of triathlon outfit, a 3-in-1 suit: You pick your preferred term. Not to be confused with a neoprene wetsuit, which provides buoyancy and insulation for the swim.

Should i put on an additional suit to swim?

It depends on the water temperature! The neoprene suit provides buoyancy, an asset for the swim leg. Good to know: The French Triathlon Federation forbids isothermal swimsuits when the water temperature is above 75°F and makes them compulsory when the temperature goes below 61°F. Between 61 and 75°F, it's up to you.

With or without underwear?

We recommend you wear a sports bra for good chest support; however, we encourage you not to wear pants to avoid any unnecessary chafing.



Product testing

A dozen triathletes tested this trisuit from its earliest design to the final prototype to improve it right down to the last details.

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


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