I was honestly skeptical at first, but this little comb saved me. I’ve been dealing with grays popping up way too fast between salon visits, and this covers them in literally seconds. I just brush it through my roots and they disappear—no mess, no weird smell, and it actually looks natural. It stays on all day too, even when I’m sweating or running around. I’ve had friends ask if I colored my hair again, and nope—just this comb. Total game-changer.