Organic Long Sleeve T-Shirt Sunrise
3 Year Warranty
60 Day Returns
UK Brand
Recommended Add-ons
Materials & Care
Materials
100% organic cotton
Care
Machine wash cold at 30°C, inside out.
Hang to dry — do not tumble dry.
Warm iron if needed. No bleach or fabric softener.
Built for daily wear.
Cut from ultra soft organic cotton in a relaxed fit, with a limited edition Seashell logo and exclusive print. Understated, comfortable and made to be worn on repeat.
Grown without harsh chemicals and made to last. The organic cotton tee for swimmers, surfers and anyone who lives outdoors year round, available in short and long sleeve.
Free UK shipping and returns, backed by a 1 year guarantee.
Organic Long Sleeve T-Shirt Sunrise
Take a closer look
Discover the craftsmanship and standout features that set our products apart — see exactly what makes Seashell better than other brands.
Seashell vs Others
Built by cold water swimmers, for cold water swimmers.
Every choice we make is about gear that's warmer, dries faster, lasts longer, and gives back to the water it's made for.
Other Brands
Fabrics
Recycled & organic certified
cheapest available
Designed for
Cold water sessions, daily use
Generic high street
Marine give-back
£1 per robe sale
Guarantee
3-year performance, no quibble
Oversized & boxy
Made in
UK design, audited partner factories (in person visits)
Anonymous supply chain
100% recycled fabrics
Trusted By Over 45,000 Happy Customers
FAQs
What materials do you use, and which products are recycled?
Our waterproof hero pieces are built from 100% recycled polyester and nylon, certified by the Global Recycle Standard (GRS) and OEKO-TEX Standard 100. Third-party tested, not just marketing speak.
Our knitwear uses a 50% merino, 30% nylon, 20% acrylic blend — chosen for warmth, durability, and shape retention rather than recycled content. Our socks use a similar performance blend.
Each product uses the right material for the job — we don't tell sustainability stories we can't back up.
Where does the £1 to marine conservation go?
The Captain Paul Watson Foundation works to protect ocean wildlife and challenge illegal fishing worldwide.
£1 from every robe sale. No fine print.
What's your return policy and guarantee?
Two things, so you're covered either way.
60-day free returns on unworn items. Taken it out for a session and it's still not right? Get in touch anyway.
3-year performance guarantee on anything that fails in normal use — stitching, zips, hardware, fabric defects. Accidental damage isn't covered, but genuine manufacturing faults are on us.
Where are Seashell products made?
Designed in the UK, manufactured by partner factories audited for fair labour and environmental practice across Asia. Materials traceable through GRS, OEKO-TEX, and GOTS certification chains.
The team visits all suppliers in person each year.
Open and transparent.