C4 - Umberto Pelizzari Fins Kraken durable wraps) means these rods

durable wraps) means these rods hold up under hard saltwater use

Blade material: tech no polymer double material with high performance and high resistance to impact even at low temperatures

Shipping weight: 1

Anatomically Designed for Maximum Comfort & Durability

5" Size: O/S - adjustable velcro back Unlined

C4 - Umberto Pelizzari Fins Kraken durable wraps) means these rodsUmberto Pelizzari. This mythical name and not much more would be enough to describe these fins. Tens of thousands of hours spent training, an impressive series of World Records in Constant Weight make Umberto an absolute reference when it comes to knowledge and experience in the use of freediving equipment. The new UP fins featuring technopolymer blades and 250 foot pockets are the result of the close collaboration between Umberto and C4. The