The nylon bristles have moderate curls inside to prevent them from falling apart. (For natural hair, only pig hair has natural curls. Of course, it has been processed to resemble cuticles to make it highly contented, and the image is close to the animal hair to the maximum extent. If the brush gets a habit, you can put it in hot water and it will return to it. The color of the hair mimics the raw badger is luxurious, and most importantly, the tips are white, so you can see the color and amount of paint well. It is elastic, well contained and holds the bristles well, so it can be applied to any oil painting, acrylic or watercolor painting. Extremely durable is an important point for this brush. The shaft is black frosted because the light is not reflected in the sheath. The shork is a watercolor blend of fine bristles to create a dense blend. The long shaft is suitable for oil painting, and the strong thick hair makes the waist and more durable.