Partex™ Microfiber Polishing Bonnet is a 80% Polyester / 20% Polyamide blend. The bonnets are great for dry polishing and buffing! The generous 7.5" size is designed to work with waxing and polishing power tools. Microfiber material absorbs and holds water better than other fabrics, and outlasts other materials! Elastic band keeps the bonnet secure.