u/DookieSlayer

So I found what I determined to be some sort of jt elite mask in the thrift store and thought “oh sick! Olive thin frames!” Based on the foam and general appearance they seem to be a vintage model. But looking around online not all thin frames seem to be made equal.

Does anyone know the markers of worthwhile thin frames vs trash? Why are some considered usable/valuable and others aren’t? Build quality maybe?

Thanks!