The Vermont family that makes this mat spends a lot of time outdoors. They really get their feet dirty. Instead of a flimsy, bristly mat that becomes rough around the edges and won't endure repetitive boot-scraping, this model has been fitted together with ash wood of sustainably harvested white pine trees, a sturdy, resinous material that can take care of all you might bring home from the trail or barn. You can scrape thick dirt and stones against the corners and edges of the mat without concern about ripping or tearing it. The palmyra bristle brush helps out with extra scraping for truly mucky boots.