My friends at Sea Swim Cornwall invited me to design a swim hat.
Here it is:

I made two designs of St Ives Harbour, to show the East and the West of the Harbour.
This is the one that is on the hat.
The black and white is for the flag of Cornwall, which you see on the flag on one of the designs.
You can buy the hat, and many other great swimming-related items, from Sea Swim Cornwall: https://www.seaswimcornwall.co.uk/
Thank you to Tom Foreman of Sea Swim Cornwall for providing reference photos, ideas, inspiration, encouragement and practical help.
Here is me modelling the hat in Brighton last week.

I sketched the design on paper, then photographed it and laboriously traced it using “Graphic” which is a diagramming app.
Tracing the drawing using the mouse. It took ages. But this was in lockdown 1. So I had ages.