Carbon Fiber is used in sporting goods to take advantage of some of the superior attributes of this material. Carbon Fiber is very strong when it is used with a resin to hold it in a specific shape. The orientation of the fibers allows for high strength characteristics for a direction of fiber orientation.
Archery and other sports stay on the cutting edge by using the best materials in the manufacture of equipment. Arrows (A.K.A. bolts) are an important part of the equipment that is required for a successful archery sport session. There are competing materials such as aluminum, but carbon fiber is a very prominent material for this application.
The superior strength to weight ratio of carbon fiber allows it to give huge improvements to sporting equipment. Carbon fiber arrows (bolts) are a great example of modern materials benefiting a historic pursuit.