Final answer:
Hair extensions come in various types, including kanekalon, nylon, rayon, human hair, yarn, Lin, and yak.
Step-by-step explanation:
The materials that come in a variety of types, including kanekalon, nylon, rayon, human hair, yarn, Lin, and yak, are hair extensions. Hair extensions are used to add length or volume to a person's natural hair. They can be made from various materials such as synthetic fibers like kanekalon and nylon, natural fibers like human hair and yak, and even yarn.