Open Box Seac F1 SRobust foot pocket, square profile and reinforced edges. All this is surprising if we consider an ultra light fin like the Seac F1 S which, in just 730 gr., summarizes all the quality and the search for underwater performance typical of the Seac brand. The Seac F1 S features a blade designed to minimize the effort and release an unprecedented thrust in such a light fin. The Ultra Flex technopolymer joins the rigid sections of the blade to guarantee