Synthetic:Hair fibers that aren't actually hair. These strands consist of plastic. Most often than not, they are heat safe. They are easy to straighten. To curl however, I found that lightly moistening the hair with water before curling helps create the curl you planned on creating. Without water, these fibers show a "flat" look
Remy Human Hair: Remy hair is human hair that has come from the same head. It has been shaven off in the same direction. The cuticle is still attached and is flowing in the same direction. Therefore, it has natural shine and smoothness. No added silicone.
Non Remy Human Hair/Human Hair: Just "Human hair" comes in a variety of qualities and thickness. Non Remy hair undergoes a chemical process to remove the cuticle and is dipped in silicone to restore shine and smoothness. Because of this, the shine and smoothness wears off after washing the hair x amount of times.
It can also be a mix of different women's hair. If you do not specify what kind of human hair you want, I will decide what type of human hair to construct your wig with. Because of this, I cannot guarantee the wig will live up to your expectations.