Kinky braid hair can be from humans or made from plastic fibers. Often, shops sell plastic kinky braid hair. This hair is made from stuff like kanekalon or toyokalon, which look like afro hair. It's cheaper, light, and comes in lots of colors and styles. People use it for twists, box braids, or fake locks.

Human kinky braiding hair, on the other hand, is 100% real human hair and costs much more. It looks much more natural and blends well with your hair. You can wash, style, dye, and reuse human hair, which lasts longer than plastic hair. It's softer and easier to handle but needs more care.
Braiding hair can be human or plastic. Plastic hair is used more because it's cheap and easy, but human hair looks real and feels great. When picking hair, think about how much money you want to spend, how long you want it to last, and if you want it to match your natural hair. Always read the product info to see what type of hair you're buying.