Have you seen a pair of older sea boots before? On the older ships, there were no walls and roofs on the bridge, they operated with a so-called “open bridge”. This meant that the mate, captain, pilot, etc. had to be outside in all kinds of weather to guide the ships safely. So obviously you needed good clothes!
That meant, among other things, sea boots of the type you see here. The boots are made of thick leather and the soles are made of solid wood. The wooden soles have an insulating effect, and stop the cold from shooting up into the feet of the person wearing them. With these sea boots on, and some good thick wool socks inside, you could sail both up and down the coast in all kinds of weather!