Over their long history hog hair bristle brushes have been the primary brush of artists. While there has not been so much change in hog hair there has been improvements in? Or preparing the hair before it is made into a bristle brush. These brushes use the state of the art methods of creating strong, resilient bristle hair.Then they are blended with a proprietary synthetic filament to provide wonderful shape, holds all oils or acrylics well and power through the heaviest materials if need be. Each brush is hand cupped and fitted within a highest quality nickel plated steel ferrules which are varnished making them super rust resistant which are attached to long wood triple lacquered handles that have a balanced feel for easel painting.