Natural or synthetic fibers bundled together and attached to a handle for use in soaking up paint
and spreading it onto a surface. (1) Natural bristles are usually hog bristles or horse hair. Because
natural bristles can be softened by the water in water-borne coatings, they are most effective for
applying solvent-borne coatings; (2) Synthetic bristles are usually nylon, polyester, or blends of
these. Because some solvents can have a detrimental effect on synthetic bristles, they are most
effective for applying water-borne coatings.