Wigs

The first documentations of wigs were registered on different Egyptian artifacts as well as wall painting on ancient tombs. During hot summers a lot of Egyptians shaved their heads to keep them clean, which was much easier than cleaning them from pests.
At the same time looking bald in ancient Egypt was not considered to be aesthetically pleasing, which is why they invented wigs. Those who did not wear wigs, while remaining bald were mostly priests and laborers.

At that time wigs were not meant to replace hair. They usually consisted of various sizes of braids set with beeswax or the like, which made wigs rather stiff.