Partex™ Microfiber Polishing Bonnet is a 80% Polyester / 20% Polyamide blend. The super absorbent bonnets will transfer dirt from carpet and upholstery to the microfiber bonnet leaving a clean you can see! Microfiber material absorbs and holds water better than other fabrics, and outlasts other materials! The generous 7.5" size is designed to work with brush heads and rotary handheld carpet cleaners, used to gently extract soil from the fibers and absorbed by the bonnets. Elastic band keeps the bonnet secure.