Our pet tongue brush toothbrush set contains silicone. It is soft and comfortable, gently scrapes the substance on the surface of the tongue coating, and keeps your pet's mouth fresh and odorless. No gum damage, clean teeth. The way it works is simple:1. Immobilize your pet's head and open its mouth. 2. Start by gently brushing your teeth with a toothbrush for 30 seconds. 3. Then gently brush your pet's tongue with a tongue brush. The dense silica bristles provide a powerful cleaning power that ensures no stains are left on the surface and crevices of the teeth.