Mine is the woven plastic like kind and 8'x20'. Loose dirt falls through. Harder dirt or mud from rain stays on like if we pack up campsite when it is wet. It folds up easily and came with a bag for storage. I sweep off during the camping trip as needed. That's it!
I love it so much under the awning that I bought another for extending from that one to the screen room/picnic table. We have a no shoe policy inside our TT. At the campsite we all wear easily slip on sandals, flip flops, etc and leave on the patio mat by the door. Bringing food out for meals for example means we can leave the shoes off from camper to table.