C4 Fins Umberto Pelizzari

Only the name of Umberto Pelizzari should be sufficient to describe these fins. The new UP fins featuring technopolymer blades and 250 foot pockets, are the result of the close collaboration between Umberto and C4 Italian company. Umberto Pelizzari designed blades that put together all the elements needed: high quality materials, a futuristic design, advanced manufacturing and great mechanical resistance.

The Technopolymer Blade Fin has been created by using the most recent plastic molding technologies, with performance at the basis of this project. The UP fins, feature the new 250 foot pocket, the latest evolution created by C4. Thanks to the use of a TPE 75 ShA polymer molded over a rigid sole, the 250 foot pocket transmits energy from the foot to the blade in the best possible way, resulting in highly efficient fins. The design of the fins have allowed the use of material of the minimum thicknesses, resulting in a reduction of the weight of the 250 footpocket in size 41/42 to just 250 gr.

The reduced mass (weight) of the 250 C4 foot pocket, minimizes the energy required to transmit motion, thus allowing the diver to save considerable energy and consequently reduce muscle fatigue. The connection between the foot pocket and the blade, thanks to the internal sole, is rigid and solid, and transmits the force to the blades efficiently.

The assembly of the blade on the foot pocket without side horns, allows an elastic bending of the blade along its entire length. The 250 foot pocket features a simple assembly of the blade, thanks to a single sturdy M6 screw. The assembly and disassembly of the blade is quick and simple and the overall dimensions are optimal in case of travel.

In terms of comfort, the 3° pre-shaped anatomy of the 250 foot pocket makes it particularly comfortable to wear. The reduced thicknesses fit the upper shape of the foot, without any discomfort, allowing for an easy and simple fit.

The design and material of the blade are key features to obtain both softness, high elastic return and strong resistance to breaking. C4 has selected and tested many different polymers, selecting two blends, one for the Soft version and one for the Medium stiffness blades. These two solutions guarantee extremely high performance and resistance.

A key element feature by the C4 Umberto Pelizzari fins is the fact that the water rails are over-moulded on the blades. The length (30.2 cm), the variable height (max 17.8 mm), the thickness (3.3 mm) and the material (thermo rubber) are important features of these blades. The result is a blade that works perfectly with no interference from the water rails and minimal lateral sliding of the fin.

The tip of the blade is shaped, as whale’s tail. The blade is 59 cm long at the center and 62.5 cm laterally. The measure takes into consideration the length, from the tip of the foot-pocket, to the end of the blade. The total maximum length of the blade is 79.5 cm, while the total maximum length of the fin, so including the foot-pocket, it is 91 cm.

The angle of the blade is 29°, which added to the 3° angle of the C4 250 foot-pocket, brings the total angle to 32°.

The blade features a central smooth and glossy band, which widens from the foot-pocket to the tip of the blade. On the sides, the surface feature a carbon fiber finish look. On the back side of the blade, the finish of the surface is exactly the opposite.

Today the C4 Umberto Pelizzari fins are by amongst the lightest in the market of long polymer blade fins. They weigh less than 1200 grams a pair.