Fiberglass is the most common material used for fishing rods, regular or fly fishing. Fiberglass fly fishing rods are strong, durable, and flexible, which makes them great for fishing poles. The major problem with fiberglass fly fishing rods is that they are quite heavy compared to bamboo and graphite fly rods. Although many fly fishermen might find their arms a little tire at the end of the day, their strength and durability still makes them a great choice.