The Power Plana fins is the ideal fin for the tech diver. Made of nearly indestructible natural rubber, this high performing fin is ideal for all kinds of kicks. The high density material makes the fins negatively buoyant, a desired feature when using a dry suit and a tech rig with steel plate. The patented bungee strap is the best solution for both comfort during the dive and donning / doffing. Unlike competitors? fins, the Mares rubber fin offers a full-shape foot pocket.