It was as effective as the dust masks everyone else was wearing (not at all) and got me into the grocery store.
My husband did that exact thing - only with the blue masks - he would detach the bottom two strings and tie them together unseen - so the bottom hung open - took this everywhere including on the airlines.
I had a mask that pulled up that I wore around my neck - approved by the CDC, etc., very easy to use - and was stopped as I was getting on an American Airline, told those types of masks weren’t allowed on the airline - and given a standard blue mask - the flight attendants were going up and down the aisles constantly making sure everyone was “masked up” properly - but they never caught on to my husband.
After that, I found the unmask and used that exclusively.
that was mine
but it was my son’s yellow cub scout bandanna
maybe people thought i was a proud boy
A White Bandana is what I had as well.
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Never Surrender Never Give Up !