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I got this brush for around $10 at Target. It is Sonia Kashuk and is designed for blending eyeshadow out around the crease. It is a little too large for my eye area, so what I have been using it for is applying setting powder to my undereye area. After applying my concealer, I put a little bit of Benefits PowderFlage on my brush(or just any setting powder) and then dust it over the concealer on the undereye area. This also helps smooth out any creases the concealer left and it does it in a very gentle way. The fact that the brush is so fluffy makes the powder go on in the most lightly dusted way, because no one wants cakey looking undereye areas! I highly recommend this brush for either this purpose or for blending of eyeshadows.