Multilayered adhesive tacky mat, traps contamination in computer room, cleanroom and other dust-sensitive controlled environments for the control of footborne and wheeled contamination "dirt, dust fluff" used in computer & cleanroom environments and all other controlled environments. Mat specification; mat size-115cmx45cm 4 mats per case, 30 layered sheets per mat numbered 30 to 1. Bevelled edge and non-bevelled edge. Colour clear on grey contains biocide mildew suppresant