- The fin is performed in a robust wise combination of a polymer and a soft elastomer, the latter used for accommodating the foot, the lateral ribs and some inserts.
- Frog was the first model to use the design Cressi "foot pocket under the blade" blade arises directly from the top of the shoe, combining solidarity flap at the bottom and passing all the effort generated by flapping no energy loss through soft areas. This format allows for channeling water from the same ankle to the trailing edge of the blade, unlike traditional models, in which the foot pocket does not have any input on progress. Besides improving the directionality of the flap, this design provides a performance between 10 and 15 higher than those that would correspond to the fin blade across its surface.
- The foot pocket, designed by computer, is particularly comfortable and ensures optimum transmission of leg-fin effort.
- Frog has a higher weight compared to equivalent Cressi models of more recent design, but this feature gives it a particularly popular for use with drysuits or combinations of thickness notable because of its great power stroke. It is a very popular fin for professional work because of its robustness and comfort even after hours of use, as well as diving centers who value versatility and virtually endless duration.
