Performance Core fins by FCS offer more base and more curve in the leading and trailing edges makes for tighter turning characteristics and are a true evolution of Simon Anderson`s S81 template. A very upright right fin for quick direction changes. Made from Performance Core (PC) material and construction is designed to deliver the feeling of a traditional glass fin with the added performance of reduced weight. The stiffer flex pattern allows you to push extremely hard through turns while the Inside Foil Technology provides increased drive. Another favorite with the pros, the PC fins will suit the more powerful surfers or those wanting to push each turn to the limit. The Simon Anderson S25 fin is a lightweight fin with remarkable flex, a smooth feel and an impressive aesthetic.