Princeton Catalyst Polytip Bristles are an innovative creation in synthetic hair. The stiff bristles are extremely responsive and maintain utmost integrity when water-soaked. Catalyst Polytip is the most advanced synthetic brush line on the market: each synthetic hair has been split to replicate the natural flags of real hair. Because each individual hair has 2 or 3 distinct tips, these brushes can hold a higher volume of paint and provide a smoother application than other synthetics. Excellent for use with medium to heavy-bodied acrylics and oil paints.