Don't Worry, it's Smart Strand! Smart Strand is the only rug fiber with built-in stain resistance that will never wear or wash off. In addition to its superior durability, Smart Strand is crafted from renewable corn resources. The production of the fiber requires less energy and emits less greenhouse gas than other manufactured rug fibers. This no fuss eco-friendly fiber makes a wonderful addition to any room and is sure to endure within most lived in areas. Not only is the Euphoria Collection crafted from a performance fiber, it also features a stunning subdued color pallet and an array of fashion forward designs that easily pair with today's home fashion trends.