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Love the design, weight and low cost, but be warned, Tyvek 1443R is NOT waterproof - only highly water resistant. It has a hydrostatic head of approximately 1200 mm when new (source: http://www2.dupont.com/Tyvek/en_US/products/product_properties.html#barrier). I can't find any info about the hydrostatic head of 3M Propore so I don't know how it compares to Driducks.
Andrew
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