Which type of makeup brush is best for applying foundation?

The flat top or kabuki brush is particularly effective for applying foundation due to its dense bristles and flat surface, which allow for even distribution of product across the skin. This type of brush is designed to create a seamless finish, minimizing streaks and enhancing the overall appearance of the foundation. The flat top helps in buffing the foundation into the skin, which can lead to a buildable coverage and a smooth texture.

In contrast, while a fluffy brush is good for applying powders, it does not provide the control needed to apply liquid or cream foundations evenly. A sponge blender, while versatile and excellent for blending, can absorb a significant amount of product and may not result in the same level of coverage that a kabuki brush provides. Lastly, a fan brush is typically used for applying highlighters or blush, as its shape is designed to create a light wash of product rather than applying a base like foundation.