Different bristles have different properties. It is vital to select the correct type of hair for the application of cosmetics, depending on the desired effect. The type of hair fiber selected generally determines the overall value of your brush.

Brush hair can be divided into two kinds: natural animal hair and synthetic fiber. There are two main characteristics that distinguish one hair from another, as well as natural hair from synthetic fibers. The first and most important characteristic is the ability of catching product. Natural hairs have scales, and the more scales, the greater the ability to attract and hold products. This increased absorbency provides greater control in the application of makeup products because they are held within the body of the brush, allowing for even flow off the tip of the brush. Unlike natural animal hair, synthetics do not have scales. Synthetic fibers will not absorb makeup-liquid or powder. Resilience and stiffness are the second most important characteristic. The presence or lack of it in a particular hair will define how it can be used and with what type of liquid.