Shipping And Returns - Rock & Ruddle At Rock & Ruddle we create high quality natural bristle hairbrushes and combs that our customers love using and love to give as gifts. What Makes Rock & Ruddle Brushes So Good? Natural Boar Bristles. with one nylon tip per tuft to ensure gentle detangling. Removable Rubber Pad. The rubber is flexible, which means the bristles go through your hair without pulling. This also makes your brush super easy to clean.