C4 Indian Ocean Blades


$ 309.95 

*Note: These are priced for a pair of blades only. If you would like to purchase a complete set with foot pockets, please call us for the package discount!

These blades are made for the new 300 series footpockets (sold separately).

 In the past, to dive at very high depths, fin blades, longerons and foot soles had to be extremely stiff. This was the only way to achieve performing fins. Nowadays, blades are soft and performing, therefore modifying the divers’ athletic movement as less effort is required. This is diving, not skiing and not even climbing, where strength is key. Modern blades can bend under few hundreds grams. Stiff foot soles and footpockets are not necessary any longer as they even limit divers’ performance. C4 goal has always been to create products which allow for a fluid and constant movement in water. As a matter of fact, footpockets must serve divers helping them to freely move their feet. This is why C4 300 foot pockets’ calibrated stiffness, in combination with modern soft and angled blades, offer an amazing swimming experience. This is what modern divers require, nothing more than that: a really efficient performance.

 The blade works best when it bends completely? From heel to toe !! This is possible thanks to the double parabolic curve of blades, from heel to toe. A neutral intermediate bottom and two progressive declining curves. Thus it fully exploits the shovel and its elasticity.

 A standard stiffness (Tensil Modulus) combined with a 40% higher resistance (compared to the standard) makes T700 High Tensil carbon fiber particularly suitable for more reliable and durable fins. This new line of fins by C4 is manufactured with this T700 composite material. This line of new fins are manufactured with a standard elastic modulus (ability and speed of the material to return to its original position after having been bent) and high resistance (to breakage) carbon fiber. In addition, we have introduced the new large square fabric texture whose fibers are 5 times bigger to improve the performance. The wide bands of the weaving of the T700, compared to traditional carbon fiber cloth, reduce the number of total weaves. Weaves create friction and bend the extremely thin wires of the fiber. Friction and bends, generate negative effects on the performance of the blade. Reducing this effect, by using T700, results in a higher resistance and much better elastic return of the blades, generating more efficiency (more push and less fatigue) when diving. 

 Fin blades, in areas where water rails are not present, disperse 50% of the water they come in contact with. This is what the French call “drifting”. We make an effort to move water for thrust but we disperse it on the side. Therefore the forward thrust is low, and the action useless. The solution to this problem was invented in 1993. Constant water rails, inspired by racing car spoilers, were invented to keep water on the blades and not disperse it on the sides. Divers feel as if they were kicking on two rails. Water is not side channeled, blades do not twist and system efficiency is outstanding. Especially indicated for freediving deep dives, where constant speed is key compared to acceleration.



 MATERIAL: 100% carbon fiber T700 SUPERFORCE

 BLADE DIMENSION: 786 x 190 mm

 BLADE HARDNESS: 25 soft – 30 medium – 40 hard

 WATER RAILS: Constant h10mm

 FINS ANGLE: 29°blade + 3°footpoket = 32°

 FINS WEIGHT: from 600gr. up to 730 gr.

 FOOT POCKET WEIGHT: 316 gr. in size 40/41