My wife purchased this for me five years ago. I doubted that it would work but decided to give it a go instead of complaining about losing my hair. It was easy to use, and within a few weeks I saw results. Since using the cap I have stopped losing my hair, have seen it thicken and I think it as helped prevent my hair from turning grey. My friends, family and even my hair dresser think I dye it but I don't, I credit the cap for this and for my hair being thicker and no longer falling out.