Kev lag luam Standards rau Windproof Jackets

Hais txog cov qauv kev lag luam, kev ua tau zoo ntawm cov tsho windproof feem ntau yog ntsuas los ntawm "kev ntsuas siab zoo li qub," ntsuas hauv Pascals (Pa). Tus nqi siab dua qhia tias muaj zog tiv thaiv cua. Feem ntau, sab nraum zoov- qib cua tiv thaiv lub tsho xav tau lub siab zoo li qub tshaj 500 Pa, thaum cov kws tshaj lij- cov khoom qib tuaj yeem tshaj 2000 Pa. Tsis tas li ntawd, kev ua pa kuj yog qhov taw qhia tseem ceeb, feem ntau hais tias "dej vapor kis tus nqi (MVTR)," ntsuas hauv grams ib square meter ib 24 teev (g/m²/24h). Siab-cov tsho zoo windproof feem ntau muaj MVTR tshaj 5000 g/m²/24h, kom ntseeg tau tias qhuav thiab xis nyob thaum lub sijhawm ua haujlwm ntev.