In the above gif you can see that the face material of a dartboard looks a whole lot like horsehair. And plenty of people will insist that high-quality dartboards are made with horse or camel hair, but it simply isn’t true. What’s really in a dartboard is called sisal, and it’s more closely related to tequila than the Kentucky Derby.
Source: Gizmodo – What Are the Guts of a Dartboard Made of?