Not sure but the cardigan is based on a knitted wool waistcoat British officers wore.
Cardigan is modelled after British waist coat worn by British army during the world war.
I love cardigans and all types of sweaters. But right now it's summer and I can't layer that much. I see, so you like garments that covers your arms and torso? Yeah, I also like how a lot of sweaters these days have zippers so it's easy to take them off. You know of those old ones you got to throw over your head right? Ah, you're talking about pullovers, they don't have an open in the front. Yeah yeah, sort of like jumpers, nice to wear for some occasions but not as flexible as a sweater or cardigan. Do you know anything about cardigans by the way? Well, did you know that the cardigan got its name after James Brudenell? He was a British Army general and Earl of Cardigan. Wow, I didn't know that. How interesting. I wonder what other types of clothing are named after people.
It is modelled after the knitted wool waistcoat that British officers supposedly wore during the war.