A stretchable water vapor permeable composite material comprisinga layer of porous film adhesively laminated to a layer of fabric; said porous film and said fabric having lower tensile modulus in the transverse direction than in the machine direction and having their axes of lower tensile modulus in parallel alignement, and each having, at 25 % extension in the transverse direction, a force to displacement (F/D) ratio per inch width less than 3.5; and said composite material having, at 25 % extension in the trasverse direction, an F/D ratio per 2.54 cm width less than 9.0. This composite fabric has barrier properties such as windproofness and water-penetration resistance and is suitable for use in many types of lightweight or close-fitting garments.
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