REAL TECHNIQUES CUSTOM COMPLEXION BRUSH customize your makeup with a simple click with the Real Techniques Custom Complexion Foundation 3-in-1 Brush. The Real Techniques Custom Complexion Foundation Makeup Brush provides a 3-in-1 brush for sheer to full coverage. Click the side lever to your preferred coverage level for the custom application of your makeup. Choose level 1 for maximum coverage, level 2 for medium coverage, or level 3 for minimum coverage. Clean weekly with our brush cleansing gel for improved brush performance. Customize your makeup with a simple click.