The French word for cycling cap is casquette pronounced ‘KasKet’ in English. The number one rule is they must have LUFT (look it up).
This is an essential piece of kit to go under your helmet while riding in the cold and for the all important stop at the café.
The casquette is one of the most traditional pieces of kit to own. Worn by Coppi, Bartali, Anquetil, Merckx, Hinault and LeMond to name but a few.