Skip to product information
Pickup currently not available
Stay Perfectly Warm or Cool, Whichever You Prefer
Rather good news: this baselayer actually knows what it's doing. We've engineered a heavier merino top that's still light enough for training, yet genuinely brilliant for winter layering. The infrared technology isn't just some marketing flourish – it actively helps your body regulate temperature, speeds recovery, and reduces pain naturally. Sounds like rather marvellous science, really.
Why Choose Our Infrared Merino Baselayer
Infrared Cooling Zones: Enhanced temperature regulation zones keep you at the perfect temperature whether you're mid-workout or recovering on the sofa. The fabric stores thermal energy 63 percent longer than standard fabrics and dries 65 percent faster – genuinely useful if you're not the most patient sort.
Sustainable Merino Wool: 100 percent responsibly sourced Infracycle Merino Wool that's breathable, quick-drying, and fabulously made. No synthetics, no faffing about.
Scientifically Proven Performance Benefits: Increased blood circulation, up to 20 percent more tissue oxygenation, and a rather impressive 25 percent average reduction in pain naturally. Our lab-tested technology also accelerates recovery and reduces soft tissue injuries by 80 percent on average through muscle priming.
Flattering Fit: Expandable side and arm panels mean the top actually hugs your body in all the right ways. The rib detail at neck and shoulders is rather fetching, if we do say so.
Versatile Design: Wear it solo for training or layer it under your jumpers when winter proper arrives. The infrared technology works brilliantly either way – you needn't squeeze into anything tight for it to do its job.
Antimicrobial and Sun Protected: Built-in SPF 35 plus rating and natural antimicrobial properties mean fewer washes and fresher performance.
Product Details
Size and Fit: Designed to sit comfortably without being clingy. Our model (188cm tall) wears size Large with a chest measurement of 40-42 inches. For a looser fit, size up. Available in XS through XXL.
Fabric Composition: 100 percent Infracycle Merino Wool, sustainably sourced.
Best Use: For optimal results, wear for at least 30 minutes before exercise, during your workout, and for at least one hour after. Works splendidly whether you're training, recovering, or just staying properly warm.
Care: Hand wash and air dry. Do not tumble dry. Merino's rather forgiving that way.
Perfect For: Athletes wanting genuine performance benefits. Weekend warriors who'd rather not freeze. Anyone serious about recovery. People who prefer science to marketing bluster.
This is the sort of baselayer that actually earns its place in your wardrobe. Order now and experience the difference properly engineered infrared merino makes to your training and recovery.
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!