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How do they hold flow in but keep water out?
Watch this demo video to find out!
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FREE DELIVERY $99+ AUS ($129+ NZ)
Period-safe one-piece performance swimwear
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SwimSync is a period-proof performance one-piece swimsuit designed for tween and teen swimmers. With a totally discreet leak-locking liner that absorbs 20ml of flow, it offers girls the right mix of security, support, and freedom of movement in the pool.
Built for training and race days (and just as ideal for a splashy weekend session), SwimSync packs a distraction-free, streamlined athletic cut with a secure racerback that stays put through dives, turns, and long sessions.

Absorbency
SwimSync Period Pro is designed to hold up to 20 ml, roughly equivalent to 3–4 regular pads.
SwimSync Period Pro is designed to hold up to 20 ml, roughly equivalent to 3–4 regular pads.
Material
78% Poly / 22% Spandex treated with a water resistant coating.
78% Poly / 22% Spandex treated with a water resistant coating.
But Wait, There's More!
How do they hold flow in but keep water out?
Watch this demo video to find out!
Keeping your SwimSync Period Pro swimwear fresh and fabulous is super easy! Here’s a quick guide to keep it looking great and performing its best.
Wash before use to activate the absorbent tech layers.
Rinse UnderSwim in lukewarm water until it runs clear.
This step really helps maintain their magic and keeps water resistant coating in tip top shape!
Store UnderSwim in a waterproof bag (which is super easy, because they come packaged up in one!) and rinse them when you get the chance. Make sure they don’t dry out, the tech layers don't take kindly to that.
Toss them in the machine on a cold cycle, but leave the fabric softener out of this load - it coats the tech layers and over time, it'll take some oomph out of their super-sucking abilities.
Air dry only—no dryers, please. The high heat breaks down the fibres that make your period swim undies great.
When you take them off the line, ensure they're fully dry before storing them away to avoid any unpleasant damp smells.
Visit our 'How to Care' page here.
SAME TECH BUT MIX & MATCH WITH ANY BIKINI TOP 👙
PERIOD SWIM BIKINI BOTTOMS

The care instructions for period swimwear are just like how you look after our regular period underwear. Check out the simple 3-steps needed to keep them in tip-top shape here.
Note though, that since wear comes into contact with chlorine or salt water, it's crucial to rinse them out right after a swim to protect the waterproof coating and keep your period swimwear working like a charm.

More size measurements. Note: UnderSwim is a firmer fit. If you are choosing between two sizes, you are advised to size up.
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