Quoted from rai:
I can’t figure why he wears a flannel shirt tied around his waist? Was that ever in style does he ever wear the shirt or just around his waist? I realize he’s rock/punk fusion but I don’t really see anyone else wearing this.
It was huge in Seattle in the late 80s/early 90s, part of the whole grunge fashion look. I totally did it in the 80s and early 90s for going to punk and grunge shows. You'd wear your flannel to keep you warm outside, then at the club or venue you'd take it off and tie it around your waist to mosh during the show, then put it on for the walk/ride home.