Nomad ultra-clean economy mats consist of multiple layers of adhesive-coated clear polyethylene sheets attached to a polyethylene backing. The backing adheres to the floor, while the tacky top surface removes dirt and dust contaminants from the bottom of shoes and wheels. Nomad ultra-clean mats can be used at cleanroom entrances, in hospitals, in semiconductors, medical devices, pharmaceuticals. Biological and nuclear industries, at factory-office entrances and other work areas requiring high levels of cleanliness. 40 layers size 45 cm x 115 cm