These just really didn't work for me. I have diffuse thinning--not the worst out there, but quite noticeable. Sprinkling the fibers just caused them to kind of bunch up and clump, so it was really obvious there was something unsavory going on on my scalp. If you sweat a little bit or scratch your head, the fibers will really turn into clumps. I'm glad this works for other people, but I don't really want anyone to be able to tell that I'm hiding my thin hair behind some powder.