Our black rubber mat is molded into a classic lattice-weave pattern, creating a distinctive look for your doorstep - and an ideal texture for scraping shoes clean. The hefty mat stays anchored in place as you wipe your feet. Natural biodegradable rubber is waterproof and resists mildew and fading through the seasons. Withstands high and low temperature extremes. Resists mildew, stains and fading from ultraviolet light. Molded from vulcanized rubber. A Williams-Sonoma exclusive.