There are two types of friction facings. Molded friction facings are preferred because they withstand greater pressure plate loading force without damage. Molded friction are used when additional cushioning is needed for clutch engagement. Until recently, the material that was molded or woven into facings was predominantly asbestos. Now, because of the hazards associated with asbestos, other materials such as paper-base and ceramics are being used instead. Particles of cotton, brass, rope, and wire are added to prolong the life of the clutch disc and provide torsional strength.