If you have taken one of my workshops then you have used one of these brushes. This is a great brush for beginners. The synthetic hair attempts and does a decent job of mimicking traditional sable brushes for a fraction of the price.
Also a great brush to have on hand for aggressive lifting, scrubbing etc so that you do not harm your finer brushes.
As the name states, this is a great brush for larger washes, skies etc.