Keeper Fins are designed to help you maneuver a float tube with greater control while fishing. Their open heel accommodates a wader boot, with an adjustable elastic strap to secure the fin to your heel. The ventilated design reduces drag during upward movement and enhances thrust during downward movement. Their balance of surface area, length, and stiffness ensures efficient propulsion without making movement cumbersome. Since they do not float, it is advisable to secure them to your ankles with a short strap.