Greenough 4A Longboard Fin 10.5" - Black Surfskate The high waist design

The high waist design

Containing two self discs tethered by a carrying handle

- Glue: Aqua Alpha water-based nontoxic glues are used exclusively to bond our wetsuit materials

The 4-A has been True Ames' bread and butter for over 40 years now

A SIX-FOOT SURF LEASH DESIGNED IN PARTNERSHIP WITH JOHN JOHN FLORENCEJohn John Florence sets a high standard on the water

Greenough 4A Longboard Fin 10.5" - Black Surfskate The high waist designThe 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