This brushes is made from mongoose hair, which has a wonderful spring to it, while the hairs are soft. It holds a nice tight chisel edge that is great for painting with crisp detail and control. It is terrific for blending, underpainting and glazing, and this big one is terrific for painting large areas such as backgrounds. The flat edge of the brush is about 7/8 inch wide, making it the largest brush that I sell.