Alright surfers, if you're riding a single fin longboard and want to mix up your performance, this SBS Butterfly fin is seriously worth checking out. Inspired by the classic George Greenough 4A design, it's got that perfect blend of stability and maneuverability that makes longboarding so much fun. The 7.0 inch size gives you plenty of hold on bigger waves while still allowing for smooth turns and trim. The design features they mention - stiff base, moderate rake, medium flex, and narrow tip - all work together to create a fin that's responsive without being too loose. The stiff base provides solid tracking and stability when you're cruising, while the moderate flex through the body gives you that smooth, drawn-out turn feel that single fin lovers appreciate. Whether you're a beginner looking for a reliable fin or an experienced surfer wanting to experiment with different single fin setups, this one delivers consistent performance. It's compatible with most standard single fin boxes, so installation is straightforward. The quality construction means it'll hold up through plenty of sessions without losing its shape or flex characteristics. If you're tired of your current fin or just want to try something with a bit more heritage and design thought behind it, the SBS Butterfly brings that classic single fin feel with modern manufacturing quality. Definitely a solid choice for anyone serious about their longboard setup!