Umbria brushes have a stiff synthetic hair which provides a sharp point and edge with excellent control. The resilient hair is not as stiff as natural bristle but is firmer than sable.
Angular Brights/Shaders: Used for tight shading and curved strokes.
Brights: Length and width of brush is generally squared. Similar to flats, but shorter hairs make a stiffer brush.
Fans: Brush fibers are spread out making it useful for subtle blending and for textural effects.
Filberts: Create a softer edge than a flat or bright.
Flats: Longer hairs than a bright, this brush has more flex and a large color carrying capability.
Rounds: Smaller sizes are typically used for detail work and larger sizes tend to be used for washes and filling in color.