\defaultfontfeatures[Pennstander-ExtraLight]
{
  Extension           = .otf,
  UprightFont         = Pennstander-ExtraLight,
  ItalicFont          = Pennstander-ItalicExtraLight,
  BoldFont            = Pennstander-Regular,
  BoldItalicFont      = Pennstander-ItalicRegular,
  Ligatures           = {Common,TeX}
}