The AM1 Fiberglass fin was designed by iconic shaper Al Merrick. Of the three AM1 sets this is the stiffest version, making it optimal for stability and control in powerful surf while the additional rake provides hold when driving through carves. A wide base and refined tip provides hold off the bottom and release off of the top while the fiberglass adds durability in reef breaks. The Control Series features a layer of uni-carbon strips which give them a much more dynamic response. The uni-carbon gives these fins a thinner profile translating to lighter weight and decreased drag with out sacrificing durability or control you would expect from a fiberglass fin.