Welcome to the second generation of AU Fins. We have improved our first generation with the hybrid model taking in feedback from thousands of AU surfers to design this model around what these surfers wanted to see changed in our fins. Like the name sounds this model is a hybrid between a traditional linear / straight fin and our first generation AU model. We reduced the fins curved approximately 30%, and we also shifted the mid-faced curved higher up towards the base of the fin box. With the curved higher it allows for steeper drops and better performance in larger waves. The AU Hybrid is composed of fiberglass, epoxy resin, and a large honeycomb center for additional strength.