The Mares Power Plana Fins are ideal for tech divers but efficient enough for the average recreational diver as well. They are constructed from natural rubber which makes them almost indestructible. The Mares Power Plana Fins makes any style of kick easy to maneuver and master. The dense natural rubber is negatively buoyant therefore ideal for tech divers as well as drysuit divers. The Mares Power Plana Fins are equipped with Mares' patented bungee strap with the large finger loop making them easy for donning and doffing the fins.