Natural bristles are hair fibers sourced from animals, commonly from pigs, sables, or goats. These bristles are often used in brushes for painting, makeup, and cleaning due to their ability to hold paint or other substances effectively. They provide a unique texture and flexibility that synthetic bristles may not replicate. The use of natural bristles dates back centuries, making them a traditional choice for artisans and professionals. Many artists prefer them for their ability to create fine details and smooth strokes. Additionally, natural bristles are biodegradable, making them an environmentally friendly option compared to synthetic alternatives.