Hidden Core Technology: Densely packed bristles create a sturdy interior that is surrounded by a perimeter of soft, flexible fibers for easy blending and a streak-free finish. Synthetic Bristles: Compatible with all makeup textures, these animal-friendly fibers feature tapered tips that conform to fine lines and facial contours. Polyurethane Blender: The non-porous gel prevents product absorption while the bouncy texture precisely deposits pigment for full, even coverage.