I modeled a helmet worn by Kievan Rus' warriors. In the image there is chainmail, however, the chainmail isn't my design. The link to it can be found here -> https://www.thingiverse.com/thing:2216743. Just a note, mess with the scaling of the helmet to make it fit on your head. Once it is done printing, I recommend using a heat gun to bend it slightly so it fits more comfortably.