Trying out F40 mask. Suggestions?

[bampi]

If you are reluctant to use mouth tape, consider a very thin pliable Somnoseal device. Fits just inside your mouth and provides a good seal.
I use it but still use the 2x5 strips of tape.
I tried mouth tape a few times but my chronic nasal congestion suffocates me with a completely shut mouth. My recessed jaw does not help either so I hope the soft cervical collar could offer something.