These are some very simple yet effective scuba fins. Using the channel thrust technology system to maintain thrust while minimizing fatigue, the Mares Avanti Quatro Plus Fins are a great option to go with, plus they are not all that expensive. They might not be the most advanced fins out there, but they are awesome for casual scuba diving, even in some pretty fast moving currents. They definitely have a whole lot of thrusting power.
The Mares X-Stream is a comfortable, lightweight fin. Hinged and Channel Technology delivers both stability and a lot of power for minimal effort making them very efficient. A comparable foot pocket and quick release buckle make donning and doffing a snap. Don’t forget, they also looks really good under the water.