The Liberator X-Ten fins are made with a specially designed compliant material that gives the entire blade a flexible bending force. Dynamic stabilizers on the blade surface and rails facilitate water flow which generates optimum propulsion with minimal exertion. This racy design is made from the most advanced and durable materials to provide ideal flexibility and stability. FEATURES > Non-Vented hyrodynamic design for maximum propulsion > Balanced Flexibility gives powerful propulsion without fatigue > TUSA Patented easy-to-adjust strap features quick release buckles > Color: Black (BK), Cobalt Blue (CBL), Flash Yellow (FY) > Sizes: S (SF-5500), Regular (SF-5000) TECHNOLOGY EZ STRAP AND BUCKLE SYSTEM TUSA’s EZ strap and Buckle System allows fins to be quickly and easily adjusted with minimal effort. Adjustment can be made while the fins are worn, allowing for a precise fit and ease of removal when necessary.