I bought 4 of the mats to test them out after replacing the carpet at an apartment complex, the mats trapped all the stuff on peoples shoes in the diamond grooves. I believe that the mats will save me money on carpet cleaning and maintenance costs. I'm so satisfied that I ordered ten more. BTW if you own a small business then you should check you cost between Wayfair and other product distributors.. HD Supply, Peachtree and Grainger will charge you more for these specialty items.