They have been specifically designed to break through the water efficiently and track well. The fin has been shaped with a rounded nose and flows into a thinner tail. It’s a concept that is designed from nature, which makes a fish swim more efficiently through the water, creating less drag and better traction. Other benefits is that there is a choice of holes allowing you to put the fins forward or further back that can be set up for the skiers preference. The new cap design countersinks the screws to make it flush and smooth and prevents having washers for each individual screw. The chosen material is aluminium rather than using fiberglass or carbon, as the weight of the fin is crucial for the balance of the ski. Each set of fins comes in a handy case where you can carry your spare fins and screws. Additional Information The fin forward will make the ski turn easier, the fin further back will set the ski more on edge and therefore track better.