Questions & Answers about Son bonnet de laine est bleu.
Since son means "his" here, how would you say "her woolly hat"?
Why does the sentence use de laine instead of a French adjective for "woolly"?
To describe what an object is made of, French almost always uses de (or en) followed by the noun for the material. It literally translates to "hat of wool". French doesn't typically have dedicated adjectives for materials like English words such as "wooden" or "woolly".
Why isn't there an article before laine, like de la laine?
What is the difference between a bonnet and a chapeau?
Chapeau is the general word for a hat, usually one with a brim. A bonnet is specifically a soft, close-fitting, brimless hat worn for warmth, like a beanie or a winter cap.