Dont Worry, its SmartStrand¬! SmartStrand¬ is the only rug fiber with built-in stain resistance that will never wear or wash off. In addition to its superior durability, SmartStrand¬ 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.