this cloth is be defined as the gold-standard in the microfiber world. all microfibers are rated with a GSM (grams per square meter) rating, and our professional-grade quality rating is 300 GSM. these towels are most typically used in the cleaning, auto, hotel, restaurant, and professional cleaning industries. they are used by hundreds of thousands of businesses and customers nationwide! because of their durability and quality these microfibers are up to 500x washable. they're very absorbent, and have quickly become the most popular tool to use alongside our three-bottle cleaning solution. you won’t be disappointed!