COLOR WOW Root Cover Up – Instant Grey Coverage and Highlight Touch-Up | Water and Sweat Resistant | No mess Award-Winning Formula

I've been using Color Wow to cover gray roots between salon visits as well as filling in sparseness where I could see my pink scalp peeking through at the top/front. It works great for me. I use the Medium Brown color and I think (I hope) it's natural looking and undetectable.I wouldn't say it gives complete coverage to solid gray hair but if you are like me, maybe a mix of some percentage of brown and gray hair, it does a pretty good job of covering. I try to avoid getting it into the part itself. I think it looks more natural to "paint" in strokes going away from the part to cover the hair, rather than wildly spreading it all over the part.Also, try to use a light hand when doing your hairline at your forehead. You don't want a sharp, obvious, unnatural line of demarcation. If you use too much you can wipe away and soften/blur the line with a tissue. A little goes a long way. Don’t feel like you need to keep reapplying it to the brush. Use sparingly.It lasts all day, even multiple days if you aren't washing your hair. It may rub off on your pillow case depending on how much you use and how you sleep (stomach, side or back). I really don't notice it on my pillow case except for once in a while, so I can't say it never happens. One compact lasts a long time for me, like a 2-3 years. It just depends how much and how often you use. I only need to use it a couple days a week.Here's my before pic (upper right) and after pics (lower right) looking down at my center part as well as another after pic looking straight ahead (the larger pic on the left side) to show the filling in of sparseness at hairline (forehead).