I would have to say that human is better because with synthetic a lot of the hair dries your hair out I didn't relize this until I start to notice it and asked a few people in salons and they told me the same things. It just soaks up all the moisture in you hair... And you have to get the right kind of hair just go to this website braidsbybreslin.com she will be able to help you out a whole lot. Thats where I get all my information from now.