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