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Breathable Laminates::

All breathable microporous membranes comprise an extremely thin man-made film whose physical structure contains microscopic pores that are large enough for water vapor (perspiration) to pass through but small enough not to let water droplets through. Thus the membrane is breathable, waterproof and windproof. Modern microporous membranes are usually laminated to a face fabric, and available in two and three layer versions.

Gore-Tex - Gore-Tex is a unique wafer thin microporous membrane, which contains over 9 million pores per square inch. Each pore is 20,000 times smaller than a water droplet, yet some 700 times bigger than a moisture vapor molecule. This gives the fabric the excellent levels of waterproofness and breathability that the brand is famous for.

Gore-Tex is a bi-component membrane, meaning that it is made up of two parts. The main part (that you see) is made from expanded polytetrafluoroethylene (ePTFE for short). This is then combined with an oleophobic (oil hating) layer that protects the membrane from the natural oils that the human body emits, insect repellents, cosmetics etc. The outer face of the Gore-Tex fabric is coated with a hydrophobic DWR (Durable Water Repellency) treatment which encourages surface water to bead up and run off, improving the wet weather performance of the garment and promoting breathability by preventing wetting-out of the outer face.

Gore-Tex brands::

Classic 2-Layer - Provides soft, versatile weather protection and is good for end uses such as walking, streetwear, golf, and skiing. Made by laminating a nylon or polyester face fabric to the Gore-Tex membrane and then hanging a mesh lining just inside the laminate.

Classic 3-Layer - Designed for ultimate durability in rugged use applications in tough weather conditions such as high altitude mountaineering. Made by again laminating a face fabric (usually nylon) to the Gore-Tex membrane, an inner protective mesh scrim is then laminated to the other side of the membrane, giving better durability.

Paclite - Lightweight and more packable than either two or three layer garments, designed for ultra light mountaineering or other fast moving sports. As with two layer garments, the face fabric is bonded to the Gore-Tex membrane, but unlike either of the other constructions, abrasion resistant raised nubs (or dots) protect the membrane. This means that as there is less between you and the membrane, breathability is increased.

XCR - Standing for eXtended Comfort Range, XCR is the new product from Gore-Tex, which by using new membrane technology and new lamination techniques offers 25% more breathability than classic Gore-Tex garments. Designed for mountaineers, backpackers, snowboarders, backcountry skiers and other outdoor enthusiasts who value performance and demand the most from their gear. Available in both two and three layer construction.

Hydro Dry P3 - The top fabric in the Hydrodry. P3 has a hydrostatic head. It is waterproof and has a good level of breathability. Again developed from a hydrophilic laminate, Hydrodry P3 is available in both 2-layer and 3-layer constructions. Hydrodry P3 provides customers with a technical alternative to Gore-Tex in the same way that Drilite Extreme does for Mountain Equipment.