idMASK anti pollution mask , Air pollution face masks

This mask is hard to store in a pocket unless it’s a big winter coat pocket. And I find porting big, elaborate masks around to things like meetings at restaurants awkward – what's the proper mask etiquette when arriving at a social occasion, flop it on the table? Hang it on your chair? Drape it around your neck like a paediatrician's stethoscope? A fabric or disposable mask is much easier to squirrel away discretely in a pocket.