Cressi Thor EBS Dive Fins

  

The new THOR EBS fin has a peculiar and unprecedented structure
that combines the two central ribs in high modulus polypropylene,
very reactive and a central area of ??the thermoplastic rubber with
a convex section, assembled in a polypropylene blade. Two lateral
nozzles located in the area where bending starts release the
associated negative forces and allow the use of two high response
ribs. This combination causes a channeling and acceleration of
water flow, which stabilizes and increases propulsion at equal
effort.

Features:

• The inclination of the blade with respect to the foot pocket
  has increased by 5% compared to traditional diving models. This
  angulation provides greater efficiency and a more natural foot
  position during flapping.
• Thor enjoys an exclusive system of injection of 3 materials
  patented by Cressi, which offers a combination of strength, power,
  comfort and aesthetics and the optimization of the requirements of
  each area of the fin.
• Main body of polypropylene: This material, inherited from apnea
  fins, has as main characteristic the rapid transmission of the
  applied energy and its great structural rigidity. It is applied to
  the shovel and inner area of the sole sandwich. He is very nervous
  and reactive and facilitates a very agile and effective flutter. It
  has a stress-performance ratio clearly superior to traditional
  materials (natural rubber or thermoplastic, polyurethane, EVA).
  Also, it has a great resistance to breakage to the point that
  Cressi guarantees its life for sporting use:
• Flexible elastomer: It is applied to the foot pocket and the
  areas that require flexibility and elasticity, since they influence
  the comfort of the diver: Footrest toe, interior of the sole and
  area of the instep in contact with the ankle. It is also assigned
  to the areas that require non-slip capacity: Inserts in the sole
  (area in contact with the ground) and anti-shock, such as the
  lateral nerves of the blade. The fusion of both materials is
  performed at the molecular level and its strength is guaranteed for
  life for sports use.
• Polypropylene of the high module: Especially reactive, it is
  applied to the nerves of the blade and is responsible for providing
  rigidity and return to the blade. This material connects the
  critical point of transmission of energy (the instep) with the
  nerves in one piece, avoiding the usual loss of energy through
  excessively flexible components of the foot pocket that produce a
  heavy, slow and fatigue fluttering the instep.
• It also uses several technologies common to the rest of the
  Cressi models.
• ‘Shoe design under the blade’: Now increasing its angle by 5%,
  the blade comes directly from the top of the foot pocket, solidly
  joining the fin to the foot and transmitting all the effort
  generated by flapping without loss of energy through soft areas.
  This format allows the water to be channeled from the same ankle to
  the final edge of the blade, unlike traditional models, in which
  the foot pocket has no contribution to the advance. Apart from
  improving the directionality of the flutter, this design provides a
  performance between 10% and 15% higher than what would correspond
  to the fin for its blade surface.

Thickness of the blade of decreasing profile ‘spina di pesce’ to
improve the directionality of the flutter and achieve a greater
inertia of the final part of the fin.

Foot Pocket reinforced in the upper area by a supplementary
thickness and laterally by two prolongations of polypropylene from
the upper to avoid the dispersion of energy in the process of
transmission from the foot to the blade.

FOOT POCKET with three differentiated volumes, with the central
area narrowed so that the foot remains firmly fixed inside and the
transmission of the foot-paddle effort is direct and precise.

EBS Elastic Strap Sistem (take a look at TECHNICAL FEATURES)

Features:

EBS ELASTIC STRAP SYSTEM   

It combines new buckles of an essential and hydrodynamic design,
adjustable to all Cressi models, with a brand new adjustable strap
made of highly elastic pure latex.

The latex is the most elastic material from nature and has the
quality to extend until 8 times its own length without breaking and
with complete elastic memory, that is to say, recovering its
initial length.

This on the fin’s strap gives us great advantages:

Features:

• Allows a relationship between comfort of placement and fin’s
  fixing, over systems with springs, exactly because of its high
  elastic coefficient (X8 vs. X1.5 of the spring).
• It eliminates the messy need of adjustment that traditional
  buckles have, a process that not always guarantees a perfect heel
  fixing, especially with non-experienced divers or stress situations
  during the equipping process.
• It allows, maintaining the flapping comfort, a high pressure
  level over the heel which is essential to obtain a right energy
  transmission applied to the fin without energy loss because of the
  spring effect. This is certainly its most significant feature
  because a strap excessively soft, long or without elastic memory
  reduces drastically the fin’s efficiency.
• It’s easily replaceable and essential both conceptually and in
  its production and assembly.
• The natural latex used is of greatest quality without burdens
  to affect on its features and it guarantees a high resistance to
  usage, saltpeter and sun exposure.