The SF0101 TUSA Hyflex Vesna combines TUSA s unique fin design with the latest advanced materials and hydrodynamic innovations. TUSA Hyflex Vesna is powered by TUSA s unique APS Active Pivoting System technology, the combination of uniquely positioned holes that reduces drag while maintaining constant propulsion. With a newly designed multi-compound Comfort Foot Pocket, the Hyflex Vesna has several unique features that deliver superior performance and power transfer to the fin blade. TUSA Hyflex Vesna features new TUSA Direct Reflect technology with advanced reflective material to keep you visible in low light or at night. Active Pivoting System The combination of uniquely positioned holes that reduce drag while maintaining constant propulsion and the built-in fin stop creates a soft kick that produces great power. TUSA Direct Reflect This advanced reflective material brightly reflects 180 back to the original light source. Providing high visibility in low light conditions. Enhanced Foot Pocket More rounded foot pocket shape design provides better fitting for diver s foot.