FCS II Christenson Mid Tracker Performance Glass Single FinThe Christenson Mid Tracker Fin is a single fin designed for mid length surfboards, offering a smooth, controlled feel with the ability to draw clean, flowing lines. 1 of three Christenson single fins. Overview The Mid Tracker Fin features an upright template with a moderate area, ideal for providing a balanced blend ofmaneuverability and hold. This design allows surfers tomaintain control while carving and performing smooth transitions, making it