Gore-tex Waterproof Breathable Fabrics are made from a form of polytetrafluorethylene (PTFE). PTFE is very durable and stands up to regular use and repeated laundering. The laminate will retain its waterproofness throughout the useful life of the garment although the breathability of the garment my be compromised by contaminates.
Gore-Tex XCR (eXtended Comfort Range) is similar to “Classic” Gore-Tex in waterproofness and resistance to abrasion and chemicals, but is even more breathable.
Breathability is affected by the difference in temperature and humidity between the inside and the outside of a garment. The greater the difference, the more moisture the fabric can exhale. XCR shines when you are really exerting and producing lots of heat and moisture. Depending on exertion levels, XCR is 12 to 60% more breathable than Classic Gore-Tex and overall has about 25% better breathability.
Many Gore-tex Waterproof Breathable Fabrics are a two-ply fabric and should be lined to protect the breathable membrane. Three-ply fabrics already posses a liner and so save you the effort of putting one in.