If you breathe through your mouth at night, are claustrophobic or suffer from restricted nasal breathing. The F20 is the successor of the F10 and sports a series of improved product features.
Specifications
Size
M
Overview
If you breathe through your mouth at night, are claustrophobic or suffer from restricted nasal breathing. The F20 is the successor of the F10 and sports a series of improved product features.
