The SF-22 Solla combines TUSA's rich history of performance fin design with the latest advanced materials and hydrodynamic innovations. A completely new design, the Solla has several unique features that deliver superior propulsion, speed and maneuverability. The SF-22 is powered by ForcElast technology which offers unparalleled performance and efficiency previously unseen in a traditional blade fin. In addition to ForcElast technology, the Solla features TUSA's patented 20? Angled Blade Design (A.B.D.), an optimized three channel crescent shaped blade with reinforced side-rails and vents, a multi-compound anatomic foot pocket and TUSA's Anatomic Fin Strap (A.F.S.) and EZ buckle system. Features Powered by ForcElast Technology TUSA patented 20? Angled Blade Design (A.B.D.) Multi-compound foot pocket increases power transfer to the fin blade Newly designed anatomic foot pocket enhances comfort Three channel blade with crescent tip maximizes propulsion Reinforced blade side-rails and vents fine-tune performance Standard with Anatomic Fin Strap (A.F.S.) TUSA patented EZ Strap and buckle system