It might just look like that. I think it might also be a Tyvek jumpsuit from one of the CSI’s, who probably took all his clothes.
Good point. Do those tyvek overalls have no front buttons and do the front center panels expand up to a large rolled “collar” around the back of the head— like an Elizabethan age undershirt? That’s where my observation was coming from- having a couple of actor’s (expensive handmade) shirts from long ago Shakespeare plays.
The shirt appears to have front ties, not buttons, also. Speculate the delusions of the “Sovereign” of the Appalachian Trail. There are quite a lot of drugged up loons living in the mtns, in deference to renting a shack and ... working. Fat of the land type enviro-loonies who hate all people— and drugged bipolars. Clinically speaking, from experience.