The Campbell Bros. aka Duncan and Malcolm are the men behind the Bonzer surfboard design. You’ve probably seen one, even if you didn’t know what it was, you know, large rear fin with either two or four funky small fins on the rail. Anyway, the main premise of the design is to better organise water flow on the bottom of the board, and it’s been a somewhat underground cult favourite for many, many years and has a lot of heavyweight advocates including Taylor Knox and Alex Knost.

In this clip the brothers discuss the history and evolution of the design and why they believe it has been a successful contribution to surfing.