Constructed of a flexible polypropylene blade and a thermoplastic rubber foot pocket in an open-heel design, Tilos’s lightweight Torrent fins offer increased flexibility, which translates to a more comfortable kicking experience. The face of the blade is fitted with a pair of narrow ribs for stability, and the rubber side rails have notches about two-thirds of the way up the blade to increase the blade’s flexibility while reducing drag. The positioning of the blade, mounted at the top of the foot pocket, generates significant power and thrust.