Sailors seem to have had many ideas about how to keep dry and warm in bad weather at sea. Before cotton was available to make oilskin, one sort of sea-waterproof was thick wool with the sheep grease left in to keep it waterproof.

One thing that was done was to let the hair grow long and let it hang down outside the back of the jacket, and to rub tar into the hair. That is why UK naval sailors still sometimes wear a square of cloth round their necks, as a carry-over from old times when it  was needed so the tarry plaits would not rub tar onto their uniforms.
What sort of things do sea-fishermen tend to wear when there is less cold and wet? I have heard plenty about English lobster fishermen being characterized by a blue jersey. On the Isles of Scilly they sometimes wore the name of his boat across his chest.