How to Choose a Triathlon Wetsuit: One That Won't Choke You and Lifts Your Legs

You walk into a shop (or an online store) and see prices from €200 to €900. They’re all black, they’re all rubber. The salesperson tells you: “This more expensive one has a better carbon coating and is more flexible.” Your wallet cries, you buy the most expensive one… and at your first training session you find that water pours into it or you can’t catch your breath in it.

As an IRONMAN Certified Coach I’ll tell you a secret: For a beginner triathlete, the “worse” (cheaper) wetsuit is often better than the most expensive one.

Why? And how do you choose one you can survive the start in?

1. The Wetsuit Is Your “Legal Doping”

If you’re not a former competitive swimmer, your legs probably “sink” toward the bottom. That creates huge water resistance. A wetsuit has one magical property: buoyancy.

A quality wetsuit lifts your hips and legs to the surface. Suddenly you lie in the water flat as a board.

Result: Many athletes swim faster with less effort.

Bonus: You save your legs for cycling and brick workouts.

You’ll find more on how to handle the swim leg in the Triathlon Swimming Guide.

2. Expensive vs. Cheap: The Thickness Paradox

This is where many amateurs go wrong.

Expensive models (PRO): They’re thin (1-2 mm), extremely flexible in the shoulders, but have less buoyancy. They’re made for elite swimmers who already have a perfect body position and need freedom of movement.

Cheaper models (entry-level): They’re thicker (4-5 mm on the thighs and abdomen). They’re less flexible, but have huge buoyancy.

Coach’s advice: If you swim 100 meters in 1:50 or slower, don’t buy the most expensive model. Buy a model with maximum buoyancy (often mid-range). Your legs need it more than your shoulders do.

3. Size Matters More Than Brand

You can have the best wetsuit in the world, but if it doesn’t fit, it’s your enemy.

Too big: It takes on water. The water sloshes around inside, adds extra weight and slows you down.

Too small (the biggest risk): It compresses your chest. When you try to take a deep breath in cold water and the wetsuit won’t let you, your brain sounds the alarm. You start breathing shallowly, your heart rate rises and you’re well on your way to panic in open water. If a wetsuit restricts your breathing, get out of the water, loosen or take it off, and try a bigger size.

What should it feel like? On dry land, a wetsuit has to be uncomfortably tight. Getting into it should take you 10 minutes. But it must not choke you, and you must be able to circle your arms without it “pulling” you back.

4. Putting It On Is a Ritual

Many people buy a good wetsuit but put it on badly. You have to pull the wetsuit up high into the crotch and seat it properly on the shoulders. If it stays “hanging” low, it will pull on your shoulders and after 500 meters your shoulders can be on fire.

Tip from Atte ACADEMY: Use plastic bags on your feet and hands so you slide into the wetsuit more easily and don’t damage it with your nails.

Conclusion: An Investment in Confidence

A good wetsuit isn’t just about warmth. It’s about feeling safe. When you know the water holds you up, the stress fades.

Can’t decide? Torn between sizes? Don’t buy a pig in a poke.

Talk to me in a consultation. I’ll look at your swim technique and recommend the type of wetsuit that suits your swimming style.