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Rather Good Performance Meets Comfort in One Splendid Package
Look, we've rather gone and outdone ourselves with this one. It's a quarter zip long sleeve that actually works as hard as you do, featuring infrared technology woven right into the fabric itself. Wear it before, during, or after your workout, and it'll keep doing its job whether you're prepping muscles, pushing through, or recovering on the sofa with a cup of tea.
Why Choose Our Men's Infrared Quarter Zip?
- Infrared Technology Built In: The minerals are locked into the fibres, so the benefits never fade. FDA certified as a medical device, which is rather the gold standard.
- Engineered Comfort: Tapered seams with flat-lock stitching mean zero chaffing and zero faffing about. Structured shoulder panels let you move freely without restriction.
- Proper Temperature Regulation: Holds heat 63 percent longer than standard fabrics when worn as a base layer, and dries 65 percent faster. Stays cosy when it's cold, cooling when it's warm.
- Injury Prevention and Recovery: The infrared boosts nitric oxide production, priming your muscles to stay elastic and resilient. Average 80 percent reduction in soft tissue injuries, plus 25 percent pain relief.
- Better Blood Flow and Oxygen: Increases tissue oxygenation by up to 20 percent, speeding recovery from exertion, injury, or surgery.
- Antimicrobial and Sun Safe: SPF35 plus protection and antimicrobial properties built in.
The Details You'll Rather Like
Fit and Sizing: Cut for an ergonomic fit that works without being skin tight. The infrared works brilliantly whether you prefer a snug fit or something roomier. Model shown is 183cm in a Medium. Chest measurements range from 34 to 48 inches across sizes XS through XXL. Size up if you prefer a looser fit.
How to Get the Best from It: Wear for 30 minutes before activity to prime your muscles, during your workout, and for at least an hour afterwards to support recovery. If you're rehabilitating, wear as much as possible. The technology won't diminish over time and is completely safe for continuous use.
Fabric Composition: 50 percent infrared polyester, 45 percent recycled polyester, 5 percent spandex. Wash at 30 degrees Celsius and air dry.
What You're Actually Getting: Full working quarter zip, high neck collar for wind and light rain protection, and that rather marvellous flat-lock stitching that feels genuinely lovely against the skin.
This isn't just layering wear. It's a properly handsome piece of engineering that happens to look rather fetching too. Your muscles will thank you, your recovery will improve, and you'll wonder how you ever trained without it.
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!