iPrimio Premium Clean Room Sticky Mats 24x30 Pack of 4 Sheets of 30 pcs - 120 Sheets (Blue) Recommended for food packaging, medical and manufacturing facilities. Blue. Remove and trap unwanted dirt, dust and debris from shoes Use each sheet many times before peeling off. 24 inches by 30 inch Keep sanitary-sensitive areas free and clear of foreign substances Tacky polyethylene surface. Highest Quality by iPrimio. We sell 5 Star Products.