Covers thinning areas really well, it's not perfect but my hair looks a lot better than it did before I started using this stuff. You need to have some hair left in the thinning areas for the fibers to latch onto, so depending on how much hair you've lost it may not work for you. I'd recommend buying the smalllest size bottle first and trying it out. You should also use hairspray with it to make sure the fibers stay in place throughout the day, and watch out for rain. Great product overall, restored a lot of my confidence :)