u/Dry-Charge-120

I'm trying to make a dnd campaign where the armor is more or less realistically designed and described. KCD2-ish. However, what is bothering me is I see all these different types of padded armors, and I really have no idea what the difference is or why they were used, which ones go under or over armor and why. Please somebody answer this question because I do not trust those AI answers anymore. Also, I'm asking more in the context of 14th century and early 15th.