The application of foundation, especially the T zone and U zone, requires the same consistency to allow for the natural facial movements without spoiling the overall look.
If a Liquid Foundation Brush is used, the natural unevenness of the skin will be smoothly finished with a minimal amount of foundation.
The light touch of the brush tip against the skin is enough to properly apply the foundation.
If applied from the center outward, the pores are covered, giving a much better finish than with fingers.