\defaultfontfeatures[Pennstander-Medium]
{
  Extension           = .otf,
  UprightFont         = Pennstander-Medium,
  ItalicFont          = Pennstander-ItalicMedium,
  BoldFont            = Pennstander-Bold,
  BoldItalicFont      = Pennstander-ItalicBold,
  Ligatures           = {Common,TeX}
}