Hat Week: Feathered Headpiece

Does anybody know what this kind of cap is called? I’ve seen plenty of pictures of ladies wearing this sort of “snap on” headpiece in pictures from the early 1960s. My mother also tells me that in that era, a lot of women worked from home as milliners for extra cash. Judging by the inside of the hat (see below), this could be an example of that cottage industry.

If you know what this style is called, please let me know in the comments!