A traditional longboard side bite fin template from FCS, GL fin sets consist of two high performance traditional longboard side bites in the popular G-L template with a traditional fin panel construction. G Ls feature a stiff base with subtle, responsive tip flex. Glass Flex is formulated to replicate the flex and memory properties of laminated fiberglass. It offers the flex pattern modeled of a hand-foiled fiberglass fin and the ability to mold highly technical computer generated foils accurately. Great transition fins for surfers moving from glass-on fins to the convenience, accuracy and performance of FCS.