Yamamoto’s technical rubber is called “Chloroprene.” The performance of Chloroprene is dependent on the raw material and its closed cell condition – if one or more cells are interconnected or if the wall of an individual cell is ruptured, the performance of the rubber is impaired.

Yamamoto has been successful in producing the perfect independent closed micro- cell structure. This has been achieved by employing a special polymer derived from limestone along with the most advanced manufacturing techniques – all developed by Yamamoto Corporation, Japan.

Yamamoto’s rubber is made from limestone – over 99.7% calcium carbonate. The function and quality of technical rubber is decided not only by the purity of the raw materials – the limestone that goes into Yamamoto’s technical rubber comes from one source – but also by the independent closed micro-cell structure. The independent cell structure offers the following advantages:

  • The individual cells do not absorb water. In addition, each cell of the complete independent closed cells are filled with nitrogen gas and thus do not absorb water at all and realize excellent heat retaining properties and thus offer excellent thermal insulation or heat retaining properties.
  • As a result of its special properties, no water absorption, weight of the material in dry and wet is kept almost same and therefore wetsuits made of this material are not heavy when submerged.

The closed cell content of Yamamoto Chloroprene is more than 93%, 22-33% higher than competitors whose closed cell content is typically in the 60-70% range. What does all of this mean to the Divers?This means that the divers are assured of the lightest weight, warmth and comfort. Why? Simple. Check out the features below:

  • Super lightweight
    The ratio of closed cells of our neoprene is over 93%. This ensures lightweight and a lower specific gravity – essential qualities for wetsuits and swimwear.
  • Super heat retention
    The nitrogen gas inside the individual closed cells result in exceptional heat retention and efficiency. Super stretchability Our Neoprene’s highest elongation is 480 – 580% compared to that of the human skin’s maximum elongation of 60-70% available at the armpit.
  • Uniform cell structure
    The uniform micro-cell structure of our neoprene ensures that if any part of the material surface is defaced or scarred, new independent concave micro-cells are exposed insuring continued functionality.

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