>>1863316Waterproof fabrics are hydrostatic head tested. Most cottage vendors are using fabrics that are 2000mm or higher. Meme shelters and other assorted trash don’t bother. The exception is Gortex, which uses its own in-house method. Independent tests have shown Gortex Pro (which is used in really high end clothing) to be 30,000mm. Clothing is higher than shelters, generally 10kmm to 20kmm.
