Surf fins are essential components of a surfboard that help improve stability, control, and maneuverability while riding waves. They are typically made from materials like fiberglass, plastic, or carbon fiber and come in various shapes and sizes. The design of the fins affects how the board performs in different wave conditions. Fins are usually attached to the bottom of the surfboard and can be found in different configurations, such as single, twin, thruster, or quad setups. Each configuration offers unique handling characteristics, allowing surfers to choose the best option for their style and the type of waves they encounter, enhancing their overall surfing experience.