TUSA has a 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.