Rubbing agents of the “Organic” category consisting of fibers that can be obtained from glass, rubber, carbon or Kevlar® and Twaron®. They also consist of fillers and temperature-resistant synthetic or natural resins. These pads are considered softer and quieter, but they also have a reputation for rapid wear and the development of more brake dust. In addition, they develop poorer friction behavior, especially after exposure to increased temperature. They are designed for hobby and entry-level users.