... hair washing?5.What is your question?Q1. How Much Hair Do I Need?A : For average head size, here is my suggestion ... hair at least once a week, twice a week is better. Q4. How long does it last?A : It depends on how you maintain it. Treat ... : Can they be straightened, curled ?A: Yes,you could made straightened or curled . However, don't do it too frequently, or the heat ...