Triathlon Sports Bras

Shop our great range of high-quality Triathlon Sports Bras. Use our Filters to refine your search.

Showing 49–59 of 59 results

Showing 49–59 of 59 results

Triathlon Sports Bras – Built for the Swim, Ride, and Run

When your sport includes swimming, cycling and running—all in one go—you need a bra that can keep up with the entire race. Enter the triathlon sports bra—the ultimate multitasker. Whether you’re a seasoned competitor or training for your first sprint, the right bra for triathlon offers the support, comfort, and performance you need from start to finish. A good triathlon bra is all about smart design. It needs to be supportive enough to run in, comfortable enough to bike in, and water-ready for the swim—without slowing you down during transitions. Look for triathlon sports bras made with quick-dry, chlorine-resistant fabrics that won’t sag or chafe after the swim leg. Many also feature minimal seams, soft linings, and compression-style fits to reduce bounce and friction across all three disciplines. Fit and feel matter, especially over long distances. A quality triathlon bra should feel secure but breathable, with moisture-wicking fabric that keeps you dry through sweat, spray, and full-on downpours. Wide, supportive straps help distribute pressure evenly, and racerback or crossback styles allow a full range of motion for swimming strokes, aero bars, and running form. And while function leads the way, there’s no reason you can’t look great on race day. Today’s triathlon sports bras come in sleek, sporty designs with flattering fits and fun colours that pair perfectly with your tri suit or training gear. Many are stylish enough to wear solo during warm weather races or tough training days. So whether you’re tackling an Ironman or a weekend brick session, make sure your bra for triathlon is ready for the challenge. Because when you’re swimming, biking, and running back-to-back, you need a sports bra that performs as hard as you do—every step, stroke, and spin of the way.

Find Your Perfect Tri Bra

Not sure how to pick the best field sports bra? Our Sports Bra Finder will help you find your perfect triathlon sports bra in under a minute. Amy x

Common questions

Can I swim in a sports bra during a triathlon?

Yes, you can swim in some sports bras during a triathlon.

However, not every sports bra is designed for swimming. Look for lightweight, quick-drying fabrics that won't become heavy when wet.

Check whether the manufacturer recommends the bra for swimming. Chlorine and saltwater can damage fabrics and elastic over time.

Many triathletes wear their sports bra beneath a triathlon suit throughout the race. This avoids changing bras between swimming, cycling and running.

Always test your bra in the water before race day. Make sure it stays comfortable and supportive when wet.

How should a triathlon sports bra fit to prevent chafing?

Your triathlon sports bra should feel secure without rubbing or restricting movement.

The band should stay level without riding up. Your breasts should sit comfortably inside the cups without spilling or gaping.

Look for smooth seams, comfortable straps and moisture-wicking fabrics. Avoid anything that digs in when you're leaning forward on your bike.

Remember, a bra can feel different when wet. Test yours during swimming, cycling and running before race day.

Pay particular attention to rubbing around the band, underarms and straps. A sports-safe anti-chafe product may also help during longer events.

Our How Should a Sports Bra Fit? guide explains the main fit checks.

Should I choose an underwired or wirefree sports bra for triathlon?

Both underwired and wirefree sports bras can provide good support for triathlon.

Underwired designs offer structured support and breast separation. Some women prefer this extra support during the running section.

Wirefree sports bras may feel more flexible during swimming and cycling. They can also reduce pressure points when leaning forward on the bike.

Neither style is automatically better. The most important factors are support, comfort and suitability for swimming.

Check the manufacturer's care instructions before exposing any sports bra to pool or seawater.

What is the best triathlon sports bra for large breasts?

The best triathlon sports bra for larger breasts combines strong running support with all-day comfort.

Look for bra-sized designs with supportive cups, a firm underband and secure straps. Encapsulation styles can help reduce bounce by supporting each breast separately.

Lightweight, quick-drying fabrics are particularly useful during swimming and cycling.

You'll also want a bra that fits comfortably beneath your triathlon suit. Avoid bulky seams or fastenings that might rub during longer races.

Start with our Determine Your Size guide to check your current bra size.

What type of sports bra is best for triathlon?

A supportive, quick-drying sports bra is a great choice for triathlon.

Triathlon combines swimming, cycling and running, so your bra needs to handle all three. Running usually requires the most bounce control, making high-impact support worth considering.

Look for lightweight fabrics, secure straps and smooth seams that help prevent rubbing. A low-profile design can also fit more comfortably beneath your triathlon suit.

Most importantly, choose a bra that stays comfortable when wet.

Not sure where to start? Our Bra Finder can help you explore suitable sports bras.