These flexible cutting mats come packed in a set of 4 assorted solid colors making it easy to utilize the appropriate mat for raw foods and thus avoiding cross contamination. These terrific mats are flexible so you can roll up to create a funnel-like exit for the transfer of foods to the pan without spilling. Flex mats include micro ban protection the most trusted antimicrobial product protection in the world that features built-in defense properties that inhibit the growth of stain and odor-causing bacteria, mold, and mildew thus always at work to keep the mats bacteria free between cleanings. The dishwasher is safe and knife friendly.