My hair is red/auburn, curly, and 4.5″ thick. It is virgin hair; it has never been straightened, blow-dried, or dyed. I wash my hair 2-3 times a week with sulfate-free shampoo and conditioner. I am a non-smoker and am never around those who smoke. I do not drink alcohol or use drugs. My diet is very balanced as well. I usually keep my hair in a protective braid and never brush it, only comb it with my fingers.