An excellent long lasting high quality carpet cleaning brush. The bristles are made of Nylon. Supple enough to gently scrub carpets, yet has more "memory" than other fibers such as polypropylene brush. Soft inner bristles are designed to gently scrub while the thicker outer bristles are designed to hold the machine's weight, scrub the carpet, and flex the pile. It has two different diameter bristles. The outer rows are heavier to carry the weight of the machine. While the inner white row is a lighter weight nylon. May be used with any chemical and with the "encapsulating" method. Nylon is far the best material to use cleaning carpet. This carpet cleaning brush will outperform the bonnet because

1. After the job it need not be taken to the laundry to clean.

2. You carry only one brush and not a dozen bonnet.

3. It will last longer than 100 bonnets.

4. It does a better job.