In message , Andrew
writes




ALL the face masks on sale to the public have elastic ear loops.
They are perfectly OK if worn correctly.

AIUI, these were destined for professional medical use, and the
ear-straps didn't make seal them sufficiently on the face. As such, I
guess they might be OK for shopping etc. Alternatively, the ear-straps
could be replaced with straps that go around the back of the head.




--
Ian