Conformable Microporous Fiber and Woven Fabrics Containing Same

A woven fabric comprising:

• a plurality of warp fibers and weft fibers, each said warp fibers and said weft fibers comprising expanded polytetrafluoroethylene (ePTFE) fibers having a density less than about 1.2 g/cm3 and a substantially rectangular cross sectional configuration.

A woven fabric comprising:

• warp and weft fibers comprising expanded polytetrafluoroethylene (ePTFE) fibers having a substantially rectangular cross-section configuration,
• wherein said woven fabric has a water entry pressure greater than about 1 kPa, and
• wherein said woven fabric has a moisture vapor transmission rate greater than about 10,000 g/m2124 hours.

A woven fabric comprising:

• warp and weft fluoropolymer fibers having a length and a width, at least one of said warp and said weft fluoropolymer fibers being in a folded configuration along said length of said fiber.

A woven fabric comprising warp and weft fluoropolymer fibers having a node and fibril structure defining passageways through said fiber, said fluoropolynier fibers being microporous,

• wherein said woven fabric has an air permeability less than about 5 cfm and a moisture vapor transmission rate greater than about 10,000 g/m2/24 hours.

The woven fabric of claim 87, wherein said expanded polytetrafluoroethylene fibers have a pre-weaving density of less than about 0.85 g/cc.