Watercolor brushes are specially designed tools used for painting with watercolors. They come in various shapes and sizes, including round, flat, and filbert, each serving different purposes. The bristles are typically made from natural hair, like sable or hog, or synthetic materials, allowing for a range of effects and techniques. These brushes hold water and pigment well, enabling artists to create soft washes or detailed lines. Proper care, such as cleaning them after use and storing them upright, helps maintain their shape and longevity, ensuring they perform effectively for future projects.