I grew my hair with the purpose of selling it. My hair in the picture was air dried and was not straightened. My hair is thick and soft not like normal asian hair which can be thin and coarser. My hair is naturally straight, has never been dyed, straightened, or curled. It is always air dried and has only been blow dried a couple of times. I wash my hair 2-3 times a week with kerastase ,don't do drugs, don't smoke or live in a smoking household, take vitamins daily, and only drink alcohol on occasion. I never go in the pool so there is absolutely no chorline damage. My hair is black indoors but under the right lighting and in the sun you can see the natural highlights in my hair because' I naturally have strands of red in my hair and do not have any white hairs.