What You Get The Fi23 is the big brother in the all-new Fi line, and its pro-level wave will have you grinning from ear to ear. As mentioned above, the wave is effortless and makes surfing a breeze for all levels of riders. The farther back you go, the more fun you have because you never feel like you need to pump hard or get on the gas to get back forward. The Fi23 wave is a giant playground. By tweaking the center plate, the wave shape can be customized. Closer to 100, it's mellower; closer to zero, it's steeper. At 60, it had tons of push and a really fun shape.