Gore-Tex® is a durable, micro porous film. After laminating the film to a textile liner, it is sewn into a sock (often referred to as a "bootie") that is put next to your foot in a shoe. The film is permeable to moisture (water vapor), yet impervious to water droplets due to its small pores. This way, Gore-Tex® can create a water resistant and breathable fabric, which contributes to a comfortable environment surrounding your foot.
The Gore-Tex® membrane is made out of so-called * ePTFE (expanded polytetrafluoroethylene), which has microscopic pores between the fibers. The pores are 20,000 times smaller than a drop of water, yet large enough to let through water vapor molecules. The membrane is therefore waterproof, yet permeable to moisture due to the fact that molecules in water vapor are 20,000 times smaller than water in liquid form.
One of the main assets of the Gore-Tex®-membrane is its versatility, since the features of the liner that it is laminated to defines its product characteristics. The multitude of liner options available provides product developers with the flexibility to select one tailored solution for any specific area of use.
Alfa ensures the quality
Sewing the Gore-Tex® bootie creates small holes, and one of these is enough to create a leakage. Therefore, even the most waterproof, windproof and breathable shoe will not keep you dry and comfortable unless the seams are properly sealed. By carefully selecting and treating all additional materials in the product and taping/sealing all seams, Alfa ensures your boots are completely waterproof.
As of today, several membranes similar to Gore-Tex® are available, however, this is the only technology we have found to be good enough for us to dare guaranteeing you 100 % waterproofness. A well-functioning membrane will do no good unless properly attached and sufficiently sealed. In Alfa boots, this is all taken care of. In addition, you will find added padding in typical wear and tear areas in order to further strengthen the product's longevity.
Exposing other technical materials to demanding use increases the risk of them losing their original efficiency. This is not the case with Gore-Tex®-membranes, which keeps 100 % waterproof and breathable throughout the product's lifespan.