Comment:
The dead give away for me knowing when its fake hair on a person is when the wig is shiny and the rest of a persons hair is dull.
Texture is one thing, but shine is a whole other thing. You see this best in natural light. The front part of a persons hair will be flat ironed straight, gelled, or coated with oil, and the synthetic hair looks extra shiny - almost plastic looking- with perfectly thick, styled ends. Or the front pieces look a lot less healthy than the rest of the hair.
Based on your pictures, it looks real because the texture, color, and finish seem to match perfectly with your hair. The headband is cute too. (Very cute) Double check in the daylight though - when I would wear halfs I would take a digital picture with my camera outside in the sun, when you can see your natural haircolor best.