CRESSI THOR FIN EBScompletely new design makes these fins exceptionally effective and remarkably easy to use. Their unique arched profile, combined with dual central ribs, creates a powerful flow channeling effectknown as the "spoon effect"which enhances stability and boosts thrust. Lateral holes reduce resistance and improve control by eliminating drag from common pressure points. The blades are crafted from two different materials to maximize responsiveness. Ideal for