Able to take on high foot traffic, weather rainstorms, and make spills easy to clean, polypropylene is the perfect material for an outdoor rug. Take this one for example: made in Belgium, it is machine-made from that must-have material and features a flatwoven design. Its hues of gray may seem simple, but this piece is sure to stand out with its intricate Persian-inspired pattern. To keep this piece safely in place, we recommend using a rug pad.