When you need a new watercolor brush, the first thing to decide is whether to go natural or synthetic. While natural fibers are more traditional than synthetics, some painters seek out the latter because they tend to last longer and are also almost always cheaper. Others prefer synthetic brushes because they are vegan or shy away from products sourced from animals. But opting for a synthetic brush doesn’t mean you have to compromise on performance. In fact, as technologies develop, synthetic fibers are getting harder to differentiate from the hairs of squirrels, mongooses, weasels, and other critters. Ahead, find our top five synthetic brushes and brush sets, best used with watercolor paints.