ive seen several groups that produce those headbands georgie its a cracking idea in the past ive had to wear those masks with the elastic ear thingys and they are literally a pain after an hour or so.
i would never have thought of it but its so simple and must be a great releif for those that have to wear the masks all day.
in away the surgical ones are more comfortable as they tie around the back of the head as they need to be tighter and the ppe3 masks are worse as they have to be a tight seal so murder your nose and under your chin.
we used to do decontamination drills that would last several hours your face was in bits at the end.in a way it was better doing hazmat in that you were in a total suit rather than masks.but boy are they hot and uncomfortable.