Designed for both speed generation and spending time surfing in the pocket, the 4-A is a fin that will hold when you need it to and release when the time is right. A fin that can do it all, throw one in your board and feel the success!These Volan fins are fine tuned with a precision foil as well as proper flex. They are handcrafted in Santa Barbara, CA and go through the strictest quality control. Fins made with Volan fiberglass and properly aligned for optimal weave orientation have very high performance flex characteristics — with the flex coming more from the body of the fin rather than just at the tip.