BEST WOMEN'S SWIMSUITS FOR TRIATHLON TRAINING

Call it a maillot, a swimming costume, or a swimsuit. Swimmers, togs, or bathing suits. If you’re a triathlete, what’s in the name doesn’t matter nearly as much as what it does for you.

Tri suits are your best friend for race day, but they aren’t built for daily training, so let’s just get this juicy tidbit out in the open right now: You will absolutely want to save your tri suit and train – and sometimes race – in a swimsuit. Even the pros race in swimsuits at short-course events. So why shouldn’t you?

WHY TRIATHLETES NEED A DEDICATED TRAINING SWIMSUIT (AND NOT JUST THEIR RACE KIT)

My coach always told me to “train like you race.” And while this is a great strategy for your nutrition and hydration, it’s not so good for your race kit.

Daily pool sessions in your tri suit are an expensive mistake because tri suits are specifically designed for the “whole package” of a tri.

They’ve got a Lycra/Spandex blend to give you flexibility and compression. They have a thin chamois to protect your derriere during the bike leg, and often feature textured fabric on the legs to improve aerodynamics.

These spendy kits are great for improving and supporting your race-day performance, but they don’t have the durability of a standard training suit.

The Lycra/Spandex mix just doesn’t stand up to chlorine as well as a dedicated training suit. Training suits are generally 100 percent polyester or some blend, making them more resistant to chlorine. This means your €30 training suit can easily outlast your €300 tri suit by hundreds of in-pool hours.

TRAINING SWIMSUIT VS. TRI SUIT: WHEN TO USE WHICH

Of course, you’ll need to try out that beautiful tri suit before race day – you want to have every piece of kit dialed in as much as possible. Wearing the wrong suit at the wrong time can ruin gear and cause physical discomfort (like chafing in those unmentionable areas).

For regular pool days, always wear your training swimsuit. It’s your workhorse, your swim bestie, your wingman. Choose it for most of your pool time: laps and drills, technique sessions, high chlorine swims like public pools or YMCAs, when you want a good workout without the extra buoyancy you get from a tri suit, and recreational swims like beach days, when wearing a chamois is just plain weird.

Your tri suit, on the other hand, is specialized equipment.

On race day, you’ll embrace your tri suit from transition to the finish line. You’ll want to wear it for brick workouts so you can really dial in those transitions and so you know what it feels like to sit on the bike on a wet chamois or how easily you can run in it.

Test your tri suit in open water swims, especially when you’ll be wearing a wetsuit over top. Remember, our bodies are always changing shape from gaining (or losing) muscle, and even just a kilo can make it fit entirely differently.

It’s a good practice to make sure you’ve worn your tri suit for two or three key training or simulated race sessions, so you know how it will perform and feel when the big day arrives.

WHAT TO LOOK FOR IN A WOMEN'S TRIATHLON SWIMSUIT FOR TRAINING

The best women’s triathlon swimsuit for training is usually one that balances chlorine resistance, support, comfort and freedom of movement for long pool sessions.

FABRIC

When it comes to triathlon preparation, you’re looking for a "workhorse" that can withstand hundreds of hours in a chlorinated pool while providing the support needed for long sets.

Your fabric choice isn’t just about fashion and colour schemes (although looking good never hurts). It’s actually about durability and how long the suit will last before it gets stretched out or (gasp!) see-through.

Polyester holds up so well that it’s often labeled as “chlorine proof” because it doesn’t degrade from pool chemicals, holding its shape and colour for years. For athletes spending multiple days per week in the pool, a chlorine-resistant swimsuit is often a smarter long-term investment than using a race-day tri suit for every session.

There’s a small downside, though. Polyester doesn’t have any natural stretch, so it can feel stiffer and tighter than other suits.

Other fabrics, such as Elastane, Lycra, Spandex – or a blend of the three – feel soft and silky and have excellent stretch. But if this is your go-to, beware! Chlorine eats these delicate fabrics. Extra Life Lycra, which is labeled as chlorine-resistant, is better, but still doesn’t have the staying power of polyester.

CUT AND COVERAGE

When my tri coach gave suggestions to the team for the best bathing suits, she talked about how great it was when you could find a training suit that had enough coverage for an “athlete’s booty.” And she’s right! If you’re a triathlete training your glutes for better bike times, you’re going to need a little extra coverage in the back.

To be honest, you need a good balance between hydrodynamics (how a swimmer moves through the water) and comfort.

Look for styles labeled racerback, cross-back, or muscleback designs. These keep the straps securely away from your shoulder blades, allowing for a full swim stroke.

• A medium cut leg is a standard style for training; it provides enough coverage to keep the suit from riding up while allowing freedom of movement.
• High cut leg styles are more hydrodynamic but offer less coverage in the back.
• A slightly higher neckline prevents the suit from scooping water down the front during powerful pushes off the wall.

FIT AND SUPPORT

Unlike a tri suit, which provides compression for cycling and running, a training suit prioritizes stability in the water.

The suit should feel snug, like a second skin. If there is gaping, especially at the lower back or chest, it will create drag and slow you down.

A suit with a double-layered front is nice for coverage, but it's probably not going to give you enough support, especially if you are larger-chested.

Instead, look for a training suit that features a shelf bra or you may end up wearing a sports bra underneath your suit.

Details matter, too.

• Look for suits with flat-stitched seams, which lie flatter against your skin to reduce friction that causes painful chafing.
• A fully lined suit has better durability and ensures the suit doesn’t become see-through over time.

When searching for a suit, many athletes choose to size up if they’re between sizes since 100 percent polyester doesn't have much stretch to it.

BEST WOMEN'S SWIMSUITS FOR TRIATHLON TRAINING: TOP BRANDS AND GEAR PICKS

Whether you’re looking for a bulletproof training partner that doubles as a minimalist race-day option or a highly compressed, hydrophobic skin to wear over your tri-suit, here’s a breakdown of the top gear on the market.

THE BUDGET WORKHORSES (€35-€55)

Perfect for high-volume pool training sessions and minimalist short-course racing on a budget. These suits prioritize durability over compression.

• Speedo Endurance+

The Speedo Endurance+ is your ultimate workhorse. It’s built with 100 percent chlorine-resistant fabric, making these suits practically indestructible. They don't stretch, fade or sag, even after hundreds of hours of swim time. Its snug, traditional fit ensures zero fabric movement, perfect for the athlete who wants a single, reliable suit for both grueling training blocks and local non-wetsuit sprint races.

• TYR Durafast (Durafast Elite / One)

TYR’s Durafast fabric blends the strength of polyester with the comfortable stretch of spandex. It boasts 300+ hours of performance and impressive UPF 50+ protection. It offers a slightly softer feel while remaining highly resistant to chlorine and stretching. For short-course triathletes, it provides an uninhibited, fluid shoulder rotation that helps maintain a high stroke-rate without early fatigue. (https://tyr.com/products/tyr-durafast-elite-r-womens-diamondfit-swimsuit-solid)

The Mid-Tier Performers (€55-€80)

Mid-tier choices bridge the gap between traditional pool training swimwear and specialized triathlon technical gear.

• Orca Core & Athlex Swimwear

Orca’s Core and Athlex textile lines are built using Speedline PBT fabric, which is highly chlorine-resistant and incorporates 80 percent recycled materials. These lines feature a distinctively compressive fit, giving you a taste of that locked-in, low-drag feel without a premium price point.

• TRI-FIT Propel

The TRI-FIT Propel swimwear series is constructed using eco-friendly, high-grade Italian Carvico fabric.The fabric hits the sweet spot between high-performance compression and quick-drying comfort. It features a higher hip cut and thin, secure straps to maximize range of motion, so triathletes can transition smoothly from hard pool intervals to aggressive open-water swims.

PREMIUM RACE WEAPONS (€150+)

Engineered strictly for speed. These choices utilize hydrophobic coatings, bonded seams and advanced textiles to slash hydrodynamic drag.

• Zoot Swimskins

Zoot’s premium gear focuses heavily on advanced hydrodynamics. Their legal-for-all-races Swimskins feature state-of-the-art water-repellent tech that keeps the outer layer dry, lowering surface friction. They are also cut to layer flawlessly over a standard race kit without bunching or trapping water.

• Arena Powerskin

Built from ultra-lightweight, woven textiles with high-tech bonded seams, Arena Powerskins look and feel like a second skin. They deliver muscle compression, creating a highly efficient, streamlined profile in the water. Its specialized hydrophobic coating provides minimal surface drag.

TWO-PIECE TRAINING SWIMSUITS FOR WOMEN: PROS, CONS, AND WHO THEY WORK FOR

High-performance, athletic two-piece training swimsuits have become a staple for competitive swimmers and triathletes alike.

But these aren’t beach bikinis. They are heavily engineered, high-performance training suits built with secure drawstrings, compressed paneling and chlorine-resistant fabrics.

A two-piece eliminates the torso restriction you find in a traditional one-piece. For swimmers with long torsos, one-pieces can put constant pressure on the shoulders, which can hamper your stroke. A two-piece eliminates vertical tension entirely, giving you 100 percent unrestricted shoulder rotation and core flexibility.

Our body shapes just don't fit into neat, standardized size charts. Many athletes need a medium for their hips but a small for their chest (or vice versa). Two-piece suits let you mix and match top and bottom sizes for a flawless, compressed fit.

Anyone who has ever tried to peel a soaking-wet, highly compressed one-piece off their body during a quick mid-workout bathroom break knows the struggle. A two-piece makes transitions and bathroom breaks infinitely faster and easier.

There are a few cons, though.

A two-piece creates an extra edge of fabric across your midsection which can catch water and create drag.

Also, if you are practicing explosive racing starts, there’s a risk of the two-piece shifting.

While athletic tops feature heavy-duty, under-bust bands and bottoms include secure drawstrings, they require a precise fit to stay locked down under massive pressure.

While rules vary slightly between organizers, IRONMAN, World Triathlon and many Challenge Family races generally require swimwear that fully covers the torso, making one-piece suits and tri-suits the go-to race-day option.

If you’re shopping for a two-piece, consider an internal drawstring in the bottoms to keep your suit secure when you're pushing off the wall at max effort. Look for thin, overlapping geometric straps to prevent chafing and muscle strain.

OPEN-WATER SWIM: WHEN YOU NEED MORE THAN A SWIMSUIT

Stepping out of the sterile environment of a swimming pool and into the open water changes everything, including your suit.

Whether you’re fighting core-shaking cold, trying to cheat hydrodynamic drag, or protecting yourself from marine hazards, you might want some extra gear for open-water swims.

THE HYDRODYNAMIC SHIELD: SWIMSKINS

When the water is too warm for a neoprene wetsuit but you are racing a non-wetsuit event, a swimskin is your ultimate weapon.

These are engineered specifically to be layered directly over your standard tri-suit. By compressing your entire body and smoothing over loose tri-suit fabric or pockets, a swimskin slashes frontal surface drag.

NEOPRENE SKULL CAPS, SWIM GLOVES & BOOTIES

When the temperature drops below 16°C (60°F), a standard wetsuit leaves your extremities completely exposed. Your hands, feet, and head act as major heat radiators; if they go numb, your stroke mechanics immediately fall apart.

You may want to invest in neoprene skull caps, swim gloves and booties, and a tow-float or safety buoy to keep you safe in the open water to give you more visibility and emergency floatation.

HOW TO CARE FOR YOUR TRIATHLON SWIMWEAR

You just spent your paycheck on a high-quality training swimsuit, but if you treat it like a regular piece of workout laundry it’s going to turn into a sad, sagging mess.

Chlorine, pool chemicals, UV rays, and body oils are absolute kryptonite to performance fabrics such as Lycra, Spandex, and even heavy-duty polyester.

To make them last, you need to master three basic habits: rinse, dry, and rotate.

• Rinse your suit immediately in cool, fresh tap water to remove pool chemicals, salt and sweat before they break down the elastic.
• Lay the suit out on a clean, dry towel and roll up the towel like a burrito, gently pressing down to absorb water. Never wring, twist, or stretch the suit. Unroll your “swimsuit burrito,” and lay it flat over a drying rack out of the sun.
• Avoid wearing the same suit two days in a row because these specialized fabrics need 24 hours to dry and return to their shape. Alternating between two or more training suits should double the lifespan of each one.

Other care tips to keep in mind:

• Handwash with a specialized swimwear detergent or baby shampoo, as standard detergents are too harsh and fabric softeners clog up the fabrics breathability.
• Avoid leaving your suit trapped in a hot plastic bag or germ locker, which can breed mold and a musty smell.

HOW TO CHOOSE THE RIGHT WOMEN'S TRIATHLON SWIMSUIT

The best women’s triathlon swimsuit isn’t necessarily the fastest or most expensive option — it’s the one that helps you train consistently and comfortably week after week.

Look for a durable, well-fitting swimsuit that can handle endless pool sessions, support your open-water preparation and help you save your race-day tri suit for when it matters most.

RELATED READING

• ROUVY, “From Cycling To Triathlon: A Beginner's Guide”
• IRONMAN, “How To Prepare For An IRONMAN With ROUVY: Real Routes, Real Results”
• ROUVY, “Maintain Your Fitness All Year With Indoor Triathlon Training”
• ROUVY, “How To Prevent Swim Goggles From Fogging Up: Proven Tips For Clear Vision”