Mares Avanti X3 Diving FinsThe Plana Avanti X3 diving fins have a good quality price rapport. Their characteristics make them easy to use and durable. The classic ABS system strap means they can be adjusted with one hand. The Plana Avanti X3 diving fins have a medium strength blade and an open foot pocket. The 3 channel design allows the fin to arch while moving. The stabilizers stop the water from flowing over the sides of the fin, creating great thrust with little force.