The soft, gentle grade of synthetic bristles prevents the brush from being too harsh as compared to stiffer roto brushes that can scratch and irritate the hide. A common problem with other roto brushes. The Staggered Bristle Roto Brush has rows with staggered lengths of bristles, one row with long, the next row being 1/4 in. shorter. The short-cut rows allow the long bristles to work deeper into the hair. This creates more lift and volume to the hair, prevents the matted look and invigorates stimulation to the hair base for new hair growth and faster hair training.