One of a kind- Our one of a kind or a small series production. When a pair of fins is sold out, it sold out and not coming back, we only make one of each! Why? Because we love to play and develop new products and explore the possibilities of old and new materials. We just can´t help it. On some of the OOAK fins, the footpocket and rails are premounted, and it is not possible to choose another footposket size.