I bought a speciality box just to get this brush, it is made with a really soft bristle and doesn't eat up my foundation,
I don't really lie how it applies my particular brand of foundation, and prefer a brush I got at edgars that is more round than flat and really gets into the corners of my eye with its tapered tip,
The rubybox foundation brush I now use for my highlights as the one I use is in a liquid form and it works great for that!!!