\defaultfontfeatures[MonaspaceNeon-SemiBold]
{
  Extension=.otf,
  UprightFont=MonaspaceNeon-SemiBold,
  ItalicFont=MonaspaceNeon-SemiBoldItalic,
  BoldFont=MonaspaceNeon-ExtraBold,
  BoldItalicFont=MonaspaceNeon-ExtraBoldItalic
}