bareMinerals Smoothing Face Brush. This ultra-soft foundation brush has synthetic fibres that quickly provide both control and diffusion of foundation. The amazingly effective dome-shaped design seamlessly blends creamy foundations as well as powders for a flawless, airbrushed finish. Handcrafted for fast foundation application, the makeup brush has shorter brown fibres that easily pick up the product while the longer ivory fibres create a diffused effect as you sweep foundation onto your face.