Greenough 4A Longboard Fin 9" - Green Day Use tighter turns

tighter turns

Or you can actually tighten both screws once the fin is in place and lock in both ends for an extra rigid high performance feel

and it has the highest volume per size ratio

Keep in mind the 1mm thickness takes up a little more space inside your boots (and more space than our regular knit Heat Booster Socks)

Greenough 4A Longboard Fin 9" - Green Day Use tighter turnsThe Greenough 4 A is not only the bread and butter of our collection, but its also been the most popular single fin worldwide for decadesand for good reasonits incredible functionality and versatility means itll work on just about anything. The man behind this revolutionary fin is George Greenough, whom the surf world is forever indebted to for his wave riding performance innovations beginning in the '60s. Greenough ultimately paved the way from