some may have a disorder called alopecia.ers may be undergoing cancer treatment. >> so why did you decide to donate your hair? >> well, i thought it was a really great cause and just a really easy way to help other people. >> are you nervous? >> a little bit. >> are you ready? >> i'm ready. >> reporter: every year thousands of kids and adults donate their hair to locks of love. whether you're a girl or a guy, 7 or 70, your hair is needed. and it doesn't matter what color it is. to be able to donate your hair must be at least 10 inches long. >> oh, my gosh. i love it. oh, my gosh. wow. it's really short, but i love it so much. thank you so, so much. >> thank you. >> reporter: locks of love says 80% of all donations come from us kids. you know, i haven't had my hair this short since i was real little. brings back memories of nursery school. nap time. for "teen kids news" i'm nicole. >> this fashion tip is brought to you by polo ralph lauren. as the weather cools down this fall, there's one way to heat up your look. layers. to c