Microfiber cleaning cloths are preferred by car care enthusiasts for their soft touch, absorbency, effective cleaning and rapid drying properties. With over 180,000+ fibers per square inch, it's softer than the finest silk, yet extremely durable. WeatherTech(R) Microfiber cloths are made of 80% polyester and 20% polyamide (nylon). One strand is 10 times finer then silk and 100 times smaller than a human hair. It is softer, finer and more absorbent than any other Microfiber or conventional cloth or fabric available today. Finished, rounded corners with a continuous over lock stitch so cloth has no corners to unravel. Great for detailing, dusting, wiping, cleaning. When used as a drying towel, they rapidly absorb up to 7-10 times their weight in moisture. So soft, in addition to your using on vehicle, they can even be used safely on your skin. Machine washer & dryer safe. Can be used over and over again.