dependent for existence, occurrence, character, etc., on something not yet certain; conditional (often followed by on or upon): Our plans are contingent on the weather. 2. liable to happen or not; uncertain; possible: They had to plan for contingent expenses.
But they don't do a worse job, either. Sure, expensive bristle brushes allow you to spread the varnish out smoothly, but so does a forty nine cent foam brush. So it makes sense to use the lowest-tech, least expensive tool to do the job.
Other soft makeup brushes can also be made from the different types of sables or pahmi hair and are more commonly used for smaller cosmetic brushes such as sable lip brush, medium and smaller sabel eyeshadow brushes and eyeliner brushes. Natural bristles are also used for slant eyebrow brushes or groomers, etc.