The Flix Rock Brush is a relatively stiff and heavy brush. In the Flix lineup, this is the brush with the thickest and least flexible fibers, and as a result, the feel and sound of this brush leans somewhat toward that of a rod. If you demand fast action, lots of definition and punch from a brush, this is the right choice. However, if you want to be able to sweep, we recommend choosing a lighter brush such as the Flix Classic or Jazz.
The brush's durable, strong fibers are push / pull retractable, allowing you to adjust the spread and flexibillity to your liking.