There's no regulation against wearing polyester/cotton blend shirts.
You just can't wear them while working on energized equipment.
I wear a short sleeve 65%-35% cotton-poly shirt as a regular work shirt.
I have a FR cotton shirt AVAILABLE anytime that I need it, and I wear it when necessary.
After all, you don't see guys running conduit and cable or digging ditches wearing insulated gloves, do you?
