Black Shaving Brush (Pure Bristle). GUSTAV, the collection’s classic – just like the archetype of every shaving brush, a contemporary interpretation. Made of a slightly shimmering plastic, the fine waist of the handle is a kind of anti-slip-guarantee for thumb and index finger. Ring size 21mm. The material pure bristle taken from boars produces the most bracing massage effect. The bristle brush becomes softer with use. It offers inexpensive, easy entry into the world of wet shaving. Colors range from yellow to white. With a black imitation band as decoration.