I have worn hair for over 30 years. I have worn synthetic hair, European hair, chinese hair and remy hair. I can tell you that without a doubt that human remy hair is the best for me. I am about 75% gray and 25% #1 black. The synthetic hair does not reflect light the same way that human hair does. It does not hold the curl the same way human hair does. It also feels dry from day #1. It sheds water differently than human hair. The only good thing I saw with synthetic hair is that you don't have to worry about fading and re-coloring.