Gore-Tex™ socks are constructed with an expanded PTFE membrane laminated to polypropylene felt. In contrast to standard socks, Gore-Tex™ socks employ “surface loading filtration” collecting the solids on the outside of the material rather than within it. To do this the expanded PTFE membrane is produced with an extremely uniform pore size. As a result, Gore-Tex™ socks consistently produce liquor of better quality, even in the first moments of filtration.
W.L. Gore & Associates, Inc. (Gore) is the recognized world leader in expanding PTFE membranes and applying them to various filtration applications around the world. They have been expanding PTFE membranes and laminating them to a variety of support materials, including polypropylene felt, for over 30 years. Others try to imitate their products, but fall short. They lack the membrane consistency and strength of the GORE-TEX™ socks, which is evident in the attached electro micrographs. In addition, the GORE-TEX™ socks are treated to allow higher flow rates. Finally, Gore has repeatedly upgraded the “O”-Ring used in the manufacture of its socks. The attached electomicrographs, at the same magnification, compare various products.