Color coded products help reduce cross contamination by differentiating area of use. The Rubbermaid Microfiber Cleaning Cloths feature patent pending zig-zag scrubbing strips and high quality knitting for better absorption and debris pickup. Double-finished edges of these blue cleaning cloths provide durability and shape retention. These high-quality microfiber cloths are durable up to 500 launderings. They are bleach safe, hypoallergenic, lint-free, and nonabrasive.