C502 Pro Duo Fiber Round Blender by Crown Brush. 

The Pro Duo Fiber Round Blender makes the perfect foundation blending brush due to its mixed blend of natural and synthetic fibers. The long synthetic fibers evenly disperse and blend the product, while the densely packed natural fibers help hold the brush's shape and stability. Product can either be placed directly on the brush or Face, and buffed into the skin using a circular motion. Creates a medium to full coverage application.

Bristle Profile: High Grade synthetic fibers, Incredibly durable, Indefinite lifespan with proper care, Can be used with liquid, powder, and cream cosmetics.