Unique dual-end brush features synthetic and natural bristles for easy application Ergonomically-designed, hand-held makeup brush constructed with the softest bristles, this dual-sided, CAILYN O! Wow Double Brush is cutting-edge face makeup brush design to easily apply and expertly blend for a seamless face makeup. Oval side is designed to blend makeup in hard-to-reach crevices around nose, eyes, while flat side can be used to blend foundation, bronzer, and powder.