Cressi Reaction Pro FinsReaction Pro Fins Closed foot version of the Reaction fins, the buckle up version has met with full approval from divers. The frame is molded in three different materials, according to the Cressi patented system that guarantees surprisingly smooth and powerful kicking. The blade is rather long, and has a differentiated thickness thicker at the front end of the foot, it gets progressively thinner towards the end of the blade. The wide soled foot is