FCS II Britt Merrick Twin Surfboard Fins - Medium/BlackThe FCS II Britt Merrick Twin Fin Set. "A twin fin that you can push harder, turn tighter, and surf more vertically" Britt Merrick. Placing it's self in the middle of the CI family, the BM template has a swept back long leading edge that leads into a full rounded tip. Different from other twin templates, this fin is designed to feel secure when laying into a longer turn or driving hard off the bottom. With the CI Twin Pin CI Mid in mind, the idea was