Cleanroom floor mats remove debris and dirt from a worker's shoes. They are placed outside a cleanroom to avoid potential contamination brought in by workers. Cleanroom floor mats come in tacky and carpeted forms. Tacky floor mats are adhesive-covered polyethylene sheets that grab contaminants from the soles of shoes. When one layer becomes full, it is peeled away to reveal a clean sheet. Carpeted cleanroom floor mats have a large carpeted section and a small tacky section. The carpet removes larger dirt particles before the worker steps on the tacky film.