The hair is made using Nylon and taped to end in a fine point.
There are many benefits to this type of brush hair including the ff.:
They are less prone to damage from solvents and paints. This means that you'll get a longer lifespan out of the brush.
They are easier to clean. Synthetic hair doesn't have the cell structure of animal hair which can often trap paint and other liquids in the bristles.
They are very versatile. The brushes can be used across a number of paint mediums such as oil, watercolor, and acrylic.