The SomnoFit tensioning bands can also be used with the somnipax guard and the SomnoFit-S tensioning bands with the somnipax guard S. However, the SomnoFit-S tensioning bands can neither be used with the somnipax guard , nor with the “simple” SomnoFit . The same applies to the SomnoFit tensioning bands – these, too, can neither be used with the somnipax guard S , nor with the SomnoFit-S.