11.   Voice over Firefighters wearing special protective clothing made their way through the dense smoke towards the fuel flask.

12.   While on the floor, they must follow established health and safety practices and wear the required protective clothing and equipment.

13.   Workers wear protective clothing when they handle the monkeys.

14.   All the workers were issued with protective clothing.

15.   Protective clothing must be worn when the machine is in operation.

16.   It pays to invest in protective clothing.

17.   Wear protective clothing.

18.   Only people wearing protective clothing may enter the room.

19.   Man not wearing protective clothing while pouring acid.