The GORE-TEX® membrane is the heart of all GORE-TEX® products. It contains over
1.4 billion microscopic pores per square cm (9 billion per inch). These pores
are 20,000 times smaller than a water droplet, but 700 times larger than a water vapor molecule, which makes the GORE-TEX® membrane completely waterproof from the outside, while allowing perspira-tion to escape from the inside. In order to meet the specific needs of each end use,
W. L. Gore & Associates has developed different GORE-TEX® membranes and applies them as appropriate.
The AIGLE THERMO-KIT® system enables our warm mid layer garments to be zip-ped in and out of the inner zippers of our protective shell garments at will, to create single integral cold-weather jackets. Thermo-Kit® permits your garments to evolve in response to the seasons.