Surfboard Fins CM3 Dual Tab Thruster - CARBON MESHSize CM3 SMALL surfer weight up to 70kg 3. Carbon MESH + Hexcore = Reinforced Flex Carbon mesh wraps the entire fin profile providing extra reinforcement over the entirety of the fins surface. These mesh fins not only look stunning, but will be appreciated by the power base surfer looking for a fin with a stiffer all round flex. Inside Foil *all fins feature inside foil for increased water efficiency over the fin surface, adding lift and reducing