system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Weave. What is it? How is it made? How is it attached to a person's head? and How does it look so real?

As a white male, this topic has always been a bit mystery to me. Would someone care to explain?
gpt
It's hair. Usually human hair, but you can also get horsehair or synthetic hair. It's typically sold in packs in various colors; you can purchase as many packs as you need to blend it in with your hair. 

They can be attached several ways. They can be bonded to the natural hair with keratin, glued in, sewn in, attached using little round beads that you press flat with pliers, or clip-ins, which you can take out whenever you wish. 

A lot of extensions don't look real. If you get quality hair and have it blended by a hairstylist, it can look incredibly natural. If it's the same color, follows a similar cut to a person's natural hair, and is good in quality, it will just look like it's their own hair.