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The Tri Suit That Actually Works (Rather Splendidly, in Fact)
Look, we're not ones to boast, but this infrared tri suit is rather marvellous. It's the sort of thing you put on and suddenly feel like you might actually finish that triathlon without collapsing in a heap. Engineered with infrared technology woven directly into the fabric, it works tirelessly to boost your circulation, increase oxygen delivery to your muscles, and keep your body at precisely the temperature you need. Think of it as having a personal thermostat built into your kit.
Why Choose Our Women's Infrared Tri Suit?
Temperature Regulation That Actually Stays Put: The infrared minerals are locked into the fabric itself, so the benefits never wear off. Your suit retains thermal energy 63 percent longer than standard fabrics and dries 65 percent faster. You're welcome.
Comfort Where It Counts: Our specially designed micro-perforated tri pads are wonderfully stretchy, high-density foam with built-in airflow. They cushion the pressure points that matter during those long, demanding hours in the water and on the bike.
Designed for Movement: The sleeveless cut gives you maximum flexibility, while the 70mm micro-perforated grip on the leg keeps everything precisely where it should be. The supportive athletic shape is rather fetching too, if we do say so.
Performance You Can Feel: Increased blood circulation, enhanced tissue oxygenation of up to 20 percent, and accelerated cellular metabolism mean your body has more energy available when you need it most. Users report an average 25 percent reduction in discomfort and an 80 percent average reduction in soft tissue injuries through muscle priming.
Built-in Sun Protection: SPF35 rating as standard, because sunburn is nobody's idea of a good time.
Product Details
Key Features: Back zip with draw cord, 70mm micro-perforated grip on leg, micro-perforated tri pads, sublimation printed logo.
Fabric Composition: 50 percent infrared polyester, 32 percent polyester, 18 percent elastane.
Care: Wash at 30 degrees Celsius, do not tumble dry.
How to Use It Properly: Wear it for 30 minutes before activity to prime your muscles and boost circulation. Keep it on during your event. Wear it for at least an hour afterwards to support recovery. The infrared benefits are permanent and FDA certified as a Class I medical device, so you're not just hoping it works, you know it does.
Additional Benefits: Antimicrobial properties, accelerated recovery from exertion and injury, reduced inflammation, and temperature regulation that warms and cools to suit your needs.
This is the sort of tri suit that makes you feel properly prepared. Order now and discover what a difference the right gear truly makes.
SHIPPING + RETURNS
THE RATHER IMPORTANT BITS
This rather lovely piece ships directly from our brand partner - we work with independent brands who are absolutely brilliant and work frightfully hard to create beautiful things.
SHIPPING DESTINATIONS
Now, here's the thing - our wonderful brand partners ship to lots of different places, but not all of them can ship worldwide.
Some are brilliant at international shipping, others prefer to keep things closer to home.
At checkout, you'll see exactly where this particular brand can send your goodies.
We're terribly sorry, but shipping costs do vary rather wildly depending on where you are in the world. The exact figures pop up at checkout - no nasty surprises!
RETURNS
You have 14 days to return items.
Now, we absolutely adore our brand partners - they work incredibly hard and we do try to support them as much as we possibly can. So I'm rather afraid we have to pass the return postage costs back to you. Frightfully sorry about that!
🌍 PLEASE CHOOSE THOUGHTFULLY:
Our wonderful partners put their hearts into everything they make.
Ordering multiple sizes to try at home is rather hard on our planet and makes things jolly difficult for these brilliant independent creators.
When in doubt, do ask us first!
PAYMENT
We're frightfully modern and accept all the usual suspects:
Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay, and Shop Pay
SECURE AS HOUSES
Everything's properly encrypted and secure - your details are safer than the Crown Jewels!
All prices in lovely British pounds £ GBP, though international chaps will see converted prices.
Any payment pickle? We're here to help sort things out! Contact us
We Have Lots More Like This.........
Hello, we are Sostter....
Sostter began, as all good ideas do, with a lively conversation and a shared sense of frustration. Why had the world of independent design become so serious, so samey, so… beige? Where was the spark, the imagination, the sheer joy of discovering something that made you stop and stare?
We dreamt of a marketplace that celebrated difference — where curious minds could explore a world of independent brands, design-led makers, and thoughtful artisans. A space that felt exciting, human, and beautifully imperfect.
Today, Sostter brings together remarkable people and their creations — from London to Lausanne, Brooklyn to Berlin — uniting makers and discoverers through craftsmanship, creativity, and conscience. Every object tells a story, and every purchase supports an independent brand doing things differently.
This is just the beginning. But enough about us — step inside, explore our world, and see what catches your imagination.
Giving Back
We’re proud to support Sutton Night Watch, a grassroots UK charity making a real difference in the lives of those facing homelessness. Through regular donations of stock, supplies, and essentials, we back their mission to offer warmth, dignity, and practical help to anyone in need — right where it matters most.
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Sostter partners with independent brands that intrigue, inspire, and bring something genuinely different to the world of fashion, design, and living.Join us!