SIÔN CONT Y MÔR - Christmas T-Shirt
What happens when you stick a Santa hat on a Welsh jellyfish? The answer’s obvious…
Say “Nadolig Llawen” to Siôn Cont y Môr.
He’s got his festive hat on, absolutely no backbone, and a sting in his Christmas tale. For Christmas parties, pub visits and anyone who likes their Welsh humour a little less wholesome, this is festive cheer with tentacles attached.
A classic Gildan Heavy Cotton T-shirt with a cheeky Christmas design. Designed in Wales, printed in the UK.

Available sizes
| Size | S | M | L | XL | 2XL | 3XL | 4XL | 5XL |
|---|
About the T-shirt
- 100% cotton, with colour-dependent fabric blends noted below.
- Seamless twin needle collar.
- Taped neck and shoulders.
- Tubular body.
- Twin needle sleeves and hem.
- Tear out label.
- Colours: 180gsm.
- Available in multiple colours, sizes S–5XL.
Midnight, Lilac and Sunset: 50% cotton / 50% polyester. Antique colours: 90% cotton / 10% polyester.
📦 Printed to order: Please allow 4–5 working days for printing before dispatch. A faster postage option means you'll receive it sooner — but not within 24–48 hours of ordering. Diolch! 🏴