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C4 is known for its long history of innovation and prides itself on creating products that deliver the absolute highest level of performance. This is due to constant investments in technology and research building on what has been learned the last 24 years in carbon fiber fin production.

Not content to rest on its laurels and in pursuit of perfection of an ultimate blade for both freedivingand spearfishing, C4 introduced the Blue Flap.

C4 freediving fins can be categorized into two product types using either traditional or anatomical foot pockets. These can be split into two subcategories: fins with a concave tip that sweeps IN (Red Falcon/Fuego) and fins with a convex tip that sweeps OUT (Blue Flap/Mustang 3). This provides 4 types of freediving fins from C4.