Graham Ezzy about the Zeta: 5-batten power wave sail. The new Zeta keeps a lot of the of what we love about the previous version but has an updated clew that is lighter and stronger. This is my favorite sail to compete on. The Zeta has constant power, which makes it be easier to be always planing even when there is current or chop. I recently placed 3rd at the Aloha Classic on the Zeta.