Which type of bristles are preferred for removing product buildup from hair?

Natural bristles are preferred for removing product buildup from hair primarily due to their structure and composition. Natural bristles, often made from animal hair such as boar or horsehair, have a unique texture that helps to effectively lift and distribute product residue without causing damage to the hair cuticle. They create a gentle friction that assists in breaking down built-up products, allowing for thorough cleansing while also providing conditioning benefits, as they can help distribute the natural oils from the scalp along the hair shaft.

Additionally, natural bristles are adept at picking up and holding onto oils and other residue, making them particularly effective for this purpose. This contrasts with synthetic bristles, which may not have the same ability to grip or remove buildup, as they can be more rigid and less effective in adapting to the contour of the hair strands. Soft and flexible bristles might also lack the required firmness or texture to properly lift and cleanse the buildup effectively.