Deep Blue Gear Current Fins for Diving, Snorkeling, and Swim Adult-sized pair of lightweight, durable snorkeling fins with adjustable strap-style design and medium length blade Rubberized blade center cups the water while kicking for maximum propulsion efficiency and minimum fatigue Soft rubber foot pocket with adjustable heel strap improves comfort and makes sizing easy Durably constructed to withstand breaking and cracking; flexibility ensures hours of comfortable snorkeling Fin size fits men's shoe size 4 to 12 and women's shoe size 5 to 13