GoreTex

Gore-Tex is a brand of waterproof breathable fabrics and membranes developed by W. L. Gore & Associates. The core material is an expanded polytetrafluoroethylene (ePTFE) membrane that is stretched to create a microporous structure. The pores are small enough to block liquid water droplets while allowing water vapor to pass, enabling garments and gear to resist rain while permitting perspiration to escape. The membrane is typically used in laminates that pair an outer fabric with a inner lining, and it is commonly incorporated into 2-layer, 2.5-layer, or 3-layer constructions. To enhance weather resistance, the outer fabric usually receives a durable water repellent (DWR) treatment, and seams are taped or welded to prevent leaks.

Gore-Tex was invented in 1969 by the Gore family at the company’s headquarters in the United States. The Gore-Tex name has become a widely recognized label for waterproof breathable fabrics, and the brand encompasses several product lines, including Gore-Tex Pro (durable, high-performance), Gore-Tex Active (high breathability for intense activity), and Gore-Tex Paclite (lighter-weight, packable rainwear). The Gore-Tex portfolio is used across outdoor apparel, footwear, and equipment, as well as some industrial applications.

Performance and care: waterproofness is influenced by the membrane’s integrity and seam construction, while breathability is described by the MVTR (moisture vapor transmission rate). Proper care, including reproofing of the outer fabric and avoiding heat sources that can damage the membrane, helps preserve both waterproofness and breathability over time.