Adjustable mask clip/fastener

thingiverse

A pal of mine whipped up some fantastic face masks for my wife and me during the pandemic, and they required straps in the back that needed to be tied securely. I sought out an adjustable fastener that would not get tangled in our hair while we were using it, as well as solve a persistent issue where my dog had chewed through two of the straps on my mask. Make sure to print with some supports so you end up with a clean male end for the fastener.