For applying higher coverage, this flat foundation brush is perfect.
It is best suited to our liquid and compact foundations, but also allows you to apply our traditional loose foundation powders with higher coverage. 

The flat top allows you to apply your product evenly. They are also often called Buffer brushes. The bristles are firmly tied together, which ensures higher coverage.

Once you have applied your (liquid) foundation with this brush, you can soften the look by blending with a fluffy (kabuki) brush.