Kids/Junior Thermal - SHORT Sleeve Polypro Rash Vest
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Keep kids warmer for longer in cold water with our Kids’ Thermal Short Sleeve Rash Guard. Designed to work as a technical base layer or as an extra insulating layer under a wetsuit, it delivers excellent warmth even when wet while absorbing minimal water—so children stay more comfortable during longer sessions.
Ideal for surf school, open water swimming, triathlon swim training, SUP, kayaking and general watersports, this thermal rash vest also helps reduce wind chill on exposed days. It’s a simple upgrade that can make a big difference to confidence and enjoyment—especially for kids who feel the cold.
Best For
- Surf lessons & beach days when the water is chilly
- Open water swimming and cold water confidence-building
- Triathlon club swim training (extra warmth without bulky layers)
- SUP, kayaking & sailing where wind chill bites
- Layering under wetsuits to extend the season and reduce post-session shivers
Warmth Without Bulk (Made for Movement)
The Thermotech microfibre lining traps warmth efficiently with minimal bulk, while the outer coating helps wick water away to reduce evaporative cooling. 4-way stretch and anatomically shaped panels support comfortable movement for paddling and swimming, and flatlock seams help reduce rubbing for all-day wear.
Technical Features
- Polypro Thermotech lining for excellent insulation using low-bulk microfibre fabric
- Quick-dry microfibre lining for comfort between sessions
- Durable water-resistant coating for improved warmth and water-wicking performance
- Flatlock stitched seams for breathable, comfortable construction
- 4-way stretch with anatomically shaped panels for natural movement
- Performance fit designed to sit close to the body for effective layering
- UV protection (UPF 50+)
Parent tip: For the best warmth, choose a close fit (especially if it will be worn under a wetsuit). If your child is between sizes or prefers a slightly looser feel as a stand-alone top, consider sizing up.
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
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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
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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?
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