Board Thread:Suggestions forum/@comment-98.247.21.9-20151111165123/@comment-98.247.21.9-20151112001754

Actually, Heartgold, mail is the type of armor and chain is the material. Armors made of interlocking plates are called platemail, and armors made of interlocking chains are called chainmail. However, chainmail was much more common than other mails so they usually simply called it mail.