Constructed using S-2 fiberglass, they are some of the smoothest casting rods I have ever handled. Behind that smoothness is a strength that adds a little punch to your cast and gives you the power to lay into a good fish. Many fiberglass fly rods cast like a wet noodle, not these new Superfines. Orvis rod designers snuck some design components of their popular Helios series into these new rods. As a result, they are sleek and modern yet retro looking at the same time. Fiberglass junkies will love these new rods!