the traditional, members-only gangdress of the plague rats are neonyellow/neongreen and black,
partly inflatable, hazmat-like clothers made from a strange unknown sort of rubber.
the strange rubber don't get warm even in the hottes days, is waterprooft and highly resitant against radioactivity,
most poisons and acids and all sorts of germs and diseases.
it's a bit weird to wear at the beginning, but after some time wering it, it's hard to get comfortable in other clothes.
storys about turning in a rodent or urban critter after wearing it to long is just a silly rumore. probably...