Synthetic fibre brushes are makeup brushes that are made with synthetic fibres instead of natural hair, such as goat or squirrel hair. The synthetic fibres can be made from a variety of materials, including nylon and are often designed to mimic the softness and shape of natural hair bristles. Synthetic fibre brushes are popular among vegans and those who prefer not to use animal products, as well as people with sensitive skin or allergies to animal hair. They are also easy to clean and maintain.