C4 200 Footpocket

C4 200 Footpocket

The price is for one footpocket. Mounting kit sold separately. Please allow 2 weeks for shipping if product is out of stock. 

The C4 200 Footpocket is the basis of C4's concept of diving fins featuring a modified biomechanics allowing for minimum energy consumption.

Traditional fins have blades locked or glued into the footpockets, so that the blade becomes an extension of the feet. It has been like this for at least 70 years. This has lead to some negative bio-mechanical consequences that result in additional fatigue and a general reduction in performance and safety. The blades of traditional fins, protruding beyond the toes, lie on a different plane than the neutral axis of the body. This causes a rotation around the center of gravity which the diver automatically compensates by bending the torso forward and partially flexing the legs. The C4 200 fins are providing a solution for this problem with the blade aligned under the metatarsus and not beyond the toes. This allows the diver to naturally keep a straight position, aligned with the direction of movement and his back and forth stride will become perfectly balanced. Simply put, C4 prevented the resistance due to bad posture.

The finning movement is an alternating motion, a complete cycle of the two legs involves 4 reversals of direction. With each inversion, our muscles must accelerate the masses to be put back into the reverse movement.The 200 footpockets, weighing 189gr in size 42-43, are by far the footpockets with the least mass (lighter) in the world and, the difference in mass with heavier shoes, multiplied by 4 and by the number of finning movements performed in a day, result in hundreds and hundreds less kilograms that have to be moved. The result is less effort.

For all these properties to work at their best, the fins must adapt to the diver's personal physical features. The traditional footpockets are providing a non-customizable solution that cannot be optimized in accordance with the diver's preferences. The 200 fins feature, for the first in the world, the possibility of adjustment. The blades can be easily adjusted to three distinct positions (H / M / S) to balance the stride. The results can be easily felt and with few trials the diver will find the most balanced setting that will lead to least struggle.

The 200 series fins have been tested for over 18 months by an international team of divers and in C4 testing lab, by applying three times the force of humans with fatigue tests of over 1.6 million complete cycles. Two longitudinal fixing screws, with the interposition of a polyurethane “shock absorber” between the blades and shoes, allow quick assembly and protect the blades from abnormal stress. The 200 feature specifically designed blades, not interchangeable with the other existing C4 or models from the competition. The attachment of the blades is very small, so the area is mechanically highly stressed. The blades of other models, not specifically designed for this use, do not have sufficient strength. Using other blades on the 200 footpockets is therefore highly NOT recommended.

The 200 footpockets are manufactured with two distinct materials: A soft, thin and ultra resistant TPE is over-moulded on a rigid sole made in PP. The upper material is softer (65 ShA) for sizes 36/37, 38/39 and 40/41 and slightly stiffer (74 ShA) for sizes 41/42, 42/43, 43 / 44 and 44/45 to guarantee the best comfort and performance. The 6 threaded brass bushes, that allow to change the blade position, are inserted in the sole during the moulding process. The blade tightening screws also feature an anti-unscrewing thread lock. 3D shaped water rails are applied on the blades by the over-moulding technique developed by C4 specifically for the blades of the 200 series. The O.P.S. (Over-moulding Protection System) of the water rails, protects the blade from impact and damage.

The upper of the 200 is made with a resistant and elastic thermoplastic material that gives great comfort and maximum ease of fit. Thanks to the combination of the C4 anatomy and the calibrated thicknesses, the upper is self-modelling, adapting to the shape of the right and left foot. The foot, in a relaxed position, is inserted without effort in the anatomically pre-shaped footpocket. There are no constrictions or limits to movement. The rigid plastic insole transmits all the applied energy flawlessly.

Technical information:

• Weight: 180 gr. size 41/42
• Top material: Thermoplastic material
• Top hardness:
  
  • SOFT 65 ShA: 36/37 – 38/39 – 40/41
  • MEDIUM 74 ShA: 41/42 – 42/43 – 43/44 – 44/45,
• Sole material: Made in PP
• Sole hardness: Flexural Modulus 1250MPa
• Biomechanical hardnes: SOFT, MEDIUM or HARD
• Footpocket angle: 3°
• Sole colors: Green, Red, White
• Compatibility: Only with the 200 line blades L-1090 Apnea, L-1090 Betta, L-1090 Pesca, S-990 , S-990 Camu.

Sizing: