There are no sables or animal hair used in making these brushes. Gold Sable are always a man-made synthetic filament. If you are averse to using animal products in your art, you will be glad to know that there are synthetic watercolour brushes that come close to performing like natural hair brushes.
A gold sable synthetic mimics natural hairs’ water-holding and -dispersing ability. Synthetics are less expensive and more durable than natural-hair brushes. A common name is Gold Sable.
These brushes can be used for all water-soluble media including: watercolour, acrylic, gouache and acrylic gel.