3m can say it much better than I can – and have been for the 20 plus years I’ve been in this business.
That said, I’ve cleaned hundreds of buildings – by proxy anyway – and toured thousands in my job as sales manager. I’ve seen negligent, good and great approaches to matting entry ways.
The best investment you can make in the appearance of your building is a first class and sufficient floor matting system. For a few hundred dollars per entry you can potentially save yourself thousands of dollars of janitorial expense and flooring wear, tear and replacement.
And don’t forget that a warehouse or plant entry, incompletely matted, can be more detrimental to the cleanliness of the building than an external entry.