The Firewire 5-fin set was designed with a solid carbon base to increase drive through turns, along with a bamboo/honeycomb core to create a lively flex for release. Though having a lot of surface area, these fins feel like a smaller set of fins when used as a thruster. When riding this set as a quad, the rear fins act as a pivot, giving you tighter radius than a traditional quad set.
CARBON / BAMBOO
A lightweight hexagonal core supported with carbon fiber and bamboo gives these fins a little more controlled feel than glass-ons. Engineered with a medium flex pattern, stiffer than Blackstix but more flexible than Fiberglass.
Flat foiled fins break free sooner, and are better at controlling speed. Often surfers prefer them in fast powerful surf where they do not need to create additional speed. If you have muscle memory from riding glass-ons, flat foiled fins will feel the closest.
Large (180lb+) (80kg+)