Mares Plana Avanti Tre Lightweight, efficient and economical Orthopedic foot pocket Rugged, durable construction Good thrust in an economical fin Avanti Tre features a soft anatomical foot pocket, and mid-sized blade with three channels for optimal movement of water during the kicking cycle. Perfect for travel to warm water locations. Upper and lower stabilizers help transfer energy from the foot pocket to the blade. Easy to kick for extended snorkeling time.