. Benefits: Liner & Smudge Brush features two precise brush heads to create washes of color or precise lines for a variety of eye makeup looks. RT 370 is best for precision detail, lining and smudging so you can define eyes, blend shadows and define your liner with ease. Applies liquid, cream or powder makeup such as eyeliners, eyeshadows and primers- for smooth, controlled application. Custom-cut, dual-ended brush heads both smudge and line to enhance the lash line or create a perfect winged look. Features: Superior product pickup and laydown with UltraPlush synthetic bristles - custom-cut and safe for sensitive skin. Dermatologist tested. :