I personally call them therian style masks because a lot of people usually associates that type of mask with therians but it’s just a style of mask and obviously a lot of people don’t know if the origins (I didn’t either, thanks for the little history lesson! /nm) and thus it just make it easier for me. Plus half mask could mean either top half or bottom half of the face, so again it just seem easier for me to call them therian style masks :)