"I have a woollen hat."
Translation:Minulla on pipo.
There are over a dozen regional names for this in English, most of which mean something else in other regions. What the people in some parts of the US call a "propeller hat" is what many other places call a "beanie." A pipo may be a "toboggan" or a "stocking cap" or a "toque" or so on, depending on where you're from.