cushion falls off mask

Hi I use an "Ultra Mirage II Nasal CPAP Mask with Headgear". After a while the cushion, which looks perfectly OK refuses to stay on the mask

Any simple solution? Does buying a new cushion solve this problem?

TIA
--G

Hi, this may be obvious, but have you looked at the thin plastic piece that snaps over the edges and holds it to the mask - they can break without it being obvious and you could probably use tape or glue, etc. to repair til you get a new one (been there, done that, same mask).

Thanks Julie

I did not have that little plastic piece.. I bought one and it solves the problem

--G