"Silver Brush Black Goat Silver Mop Brushes feature ultra-soft goat hair bristles ideal for blending and softening oil and acrylic colors. They can also be used with watercolors to create soft washes for backgrounds and skies. Offering excellent color holding capacity, the black bristle stiffens when wet. Short lacquered wood handles and seamless nickel ferrules ensure comfort and longevity. Brush sizes - The length and width of a brush of a given shape and size may vary by manufacturer as brush sizes are not standardized. Since fine art brushes are handmade, expect some variation even among brushes from within a single brush line." -Blick

This brush is made with natural hairs or fibers.

Natural