... mats have proven themselves effective in a wide variety of industries, including microelectronics, aerospace, pharmaceuticals, and food processing.Peel-Off ... stack of tear-off polyethylene film sheets. Persons entering a cleanroom or clean zone walk (and vehicles ... becomes loaded with contamination, it is peeled off, exposing a new clean sheet for use. ... package, made up of 4 mats of 30 sheets each.