What are the work clothes of Hitachi Global Electronics Factory?

Hello! I work in Hitachi, Futian Free Trade Zone. Theoretically, we don't have work clothes, because our work clothes can only be worn in the workshop, and it is forbidden to wear our own clothes when we leave the purification room. Our work clothes are white clothes with checks, including jumpsuits and smocks. There are no work clothes in the warehouse and no work clothes in the office.