Thermal distortion is the deflection/flex, or compressibility of a material under temperature and pressure. Both brake discs and calipers can flex and change shape when subject to excessive temperatures and pressures (load). This can result in the loss of feel in the brakes or flexing of the calipers, and eventually compromising the brake system abilities. Distortion can lead to several types of brake fade, excessive or unusual brake pad wear, unusual rotor wear, and damaged piston seals in the caliper.