Deep Blue Gear Aquanaut II Fins for Diving, Snorkeling, and Swim Durable rubber fins with full foot-fitting design and medium length blade Blade center cups the water while kicking for maximum propulsion efficiency and minimum fatigue Soft rubber foot pocket with enclosed heel improves comfort and reduces friction and chafing Fin floats in salt-water for easy retrieval if lost Fin size 11-12 fits men's size 11 to 12 and women's size 13 to 14; comes in grey