Abstract: A strap-on swimming fin apparatus configured for removable engagement with a person's limb, the apparatus having an elongate strap with a pair of mutually engagable surface fasteners, the strap configured for secure removable engagement around the limb. An extremity cover, such as a glove or bootie, is joined flexibly to a side edge of the first strap and is configured for engaging an associated extremity, such as a hand or foot. A pair of fins are secured to a top surface of the strap in opposing positions, thereby improving the person's thrust through the water as well as their ability to maneuver, while simultaneously allowing for full unobstructed use and articulation of both the limb and extremity.