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Rather Good Performance Meets Comfort
Look, we've rather botched fewer things than most, and this t-shirt is proof of that splendid effort. Designed for anyone who actually moves about during their day, it's the sort of garment that doesn't sulk when you ask it to work hard.
Why Choose Our Women's Infrared Performance T-Shirt
Dual Panel Construction: Two thoughtfully placed panels work together beautifully, with a pleated back that lets you bend, twist, and generally flail about without restriction.
Lightweight Yet Gloriously Durable: The fabric feels rather marvellous against skin while refusing to surrender after a few washes. It won't drag you down during intense training or, frankly, any activity requiring actual effort.
Seamless Open Neck Design: No annoying friction, no tugging, just beautifully breathable wear that actually respects your skin. The open neck reduces hot spots and keeps air flowing where it matters most.
Infrared Technology: This rather fabulous fabric works with your body's natural heat, making it utterly fetching for both performance and everyday wear.
Product Details
Fabric Composition: Lightweight, durable blend designed for range and reliability.
Construction: Seamless throughout with open neck finish.
Best For: Training, movement, anyone tired of t-shirts that don't quite cut the mustard.
This is the sort of t-shirt you'll reach for repeatedly, which rather suggests it's doing something right. Don't let this one slip away.
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.
Sell with us
Sostter partners with independent brands that intrigue, inspire, and bring something genuinely different to the world of fashion, design, and living.Join us!