Carbon fiber is a high-strength, lightweight composite material made from carbon fibers that are woven or braided into a fabric and then bonded together with a polymer matrix. The way in which the fibers are treated during the manufacturing process can result in two types of carbon fiber: dry carbon fiber and wet carbon fiber.

Dry carbon fiber refers to carbon fiber that has not been impregnated with a resin matrix, meaning that it is still in its raw form. This type of carbon fiber is lighter and stiffer than wet carbon fiber, and it is often used in high-performance applications such as race cars and high-end sports equipment. However, because dry carbon fiber lacks the added strength and protection provided by a resin matrix, it is also more brittle and prone to cracking under impact.

Wet carbon fiber, on the other hand, is carbon fiber that has been pre-impregnated with a resin matrix. This type of carbon fiber is heavier and less stiff than dry carbon fiber, but it is also stronger and more durable. Wet carbon fiber is commonly used in applications where impact resistance and durability are important, such as in aircraft and marine components.

In summary, dry carbon fiber is lighter and stiffer, but more brittle, while wet carbon fiber is heavier and less stiff, but stronger and more durable. The choice between the two types of carbon fiber depends on the specific requirements of the application.