Mad Mats' patterns are intricately woven. Multi-colored threads are woven in much the same fashion as real flat weave wool rugs. The result is a warmth and depth of color usually only available to the interior rug market. Most outdoor plastic mats on the market today are made from a combination of virgin polypropylene (PPL) and polystyrene. Mad Mats' plastic is completely different. First, our polypropylene is recycled from used soda bottles, milk bottles, packing, etc. We use only the highest grade of this recycled PPL. Then we combine it with state of the art conditioners and U.V. inhibitors to produce soft, resilient colorfast threads. Our soft tubular threads don't absorb dirt or stains of any kind. Leaves, debris, and food spills are easily rinsed away with a garden hose. They are truly carefree! This is a major advantage of Mad Mats. Most outdoor rugs are a dense weave of spun poly thread. They hold moisture for days which then gets tracked into the house. Grass, food, and dirt seep into the fiber where they remain until the rug is pulled up and washed, dried, and put back in place. YUCK! Mad Mats breathe. They don't trap water so they won't mildew and they won't rot wooden decks. Water goes right through them and evaporates right back out of them. Walking on Mad Mats the morning after a rainy night will leave your feet dry enough to walk right into the house. You put it down and that's it! All Mariachi products are produced under fair trade conditions. We do not work with factories that employ children or produce environmentally harmful waste.