We use the membrane of the English company Porelle – a manufacturer with 35 years of experience!
The most important thing for assessing the quality of the membrane are water resistance and vapor permeability. We use membrane 20000/20000 or 20000/15000. What do these numbers mean?
The first value of 20000 indicates water resistance and determines how much water pressure (column in mm) the material can withstand without leakage. In this case, 20,000 mm per 1 mm of water column.
The second value indicates vapor permeability. That is, how many grams of water vapor the membrane is able to pass through itself on an area of 1 m² per day. In the PRO series, this value is 20000 g/m2 for greater heat retention, in the LIGHT series 15000 g/m2 for more comfortable sports or warmer weather.
The membrane is very thin and must be combined with additional layers having its own special properties. For the manufacture of a Waterman dry suit we use a three-layer membrane fabric:
- 1st layer: hardshell/soft, 95% polyester, 5% spandex
- 2nd layer: Sport-Active membrane
- 3rd layer: polyester mesh.