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+ Springs back to a fine point, holds plenty of paint and releases it evenly.
− Expensive; acrylic and harsh solvents shorten its life.
+ Cheap, durable, easy to clean, animal-free; good snap for acrylic.
− Holds less water than natural hair; tips can curl or splay over time.
+ Stiff, with split “flagged” tips that grip and push thick paint.
− No fine point; leaves visible brush marks; too rough for watercolor washes.
+ Very soft and holds a huge load of water for long, even washes.
− Little spring, so it is floppy for controlled strokes.
Approximate width at the widest part of the hair. Numbers are not standardized: the same number can differ by a size or two between brands and between watercolor and oil lines.