[header] How to put on a cleanroom suit [title] Cover your hair. [step] One of the easiest ways to noticeably contaminate an area is by shedding hair. Hair falls from your head to the floor or work surface. 
With it come proteins and bacteria that will contaminate the cleanroom. You will be required to wear a hood or hairnet of some kind to prevent any hair from falling in the cleanroom (this includes facial hair).