CPAP Machines

If you google CPAP mask liners you may find something. They are on Amazon under Snugz mask liners.

Thank you wildswan I'll take a look

I had this problem. It would be mid afternoon before the lines faded. I tried all sorts and even bought foam to go over the straps but it didn’t work.
However last year on the annual check/visit by the providers of the equipment there had been a call back and it was all replaced including the mask.
The strapping on this new mask looks the same but the cut has been slightly adjusted. The lower straps come from much lower down and don’t cross the middle of my cheeks. Don’t leave any lines.
There should be a contact number on your machine. I’d ring them and see what they can do.
On one occasion I felt the Velcro on my straps was inadequate and they sorted me without issue.
Please do call them.

Just to add. I don’t wear a full face mask just a nose mask and it was the straps that marked my face, not the actual mask.

Thanks Coolgran. Mine is a full face mask and I get a deep furrow right down the middle of the cheek I lie on to sleep. It does fade slightly as the day goes on but it is, sadly, now almost permanent. I'll look to contact the manufacturer to see if they have any suggestions. Fingers crossed!!