Schumann Carbon Fibre (Pernambuco Finish) Viola BowSchumann Carbon Fibre (Pernambuco Finish) Viola Bow The Schumann Carbon Fibre (Pernambuco Finish) Viola Bow is not to be missed. Carbon fibre bows are lighter than your average wooden bows, which gives players a greater flexibility. Some players prefer it, some don't it's like asking someone whether they prefer red or blue! Either way, these bows are a great choice for the advanced player, and at such a price you can hardly afford to miss out a chance