Less than 5,000 mm/24 hours – lightly water-resistant.Here is an outline of what the ratings indicate for practical application: The millimeter rating comes from how high you can fill the column before any water gets through the fabric in the allotted 24-hour time period. In the water column test, a 1-inch-diameter column of water is placed over the fabric in question for a period of 24 hours. Pressure is an important aspect of this measurement because the same ski pants that are keeping snow out when you’re standing still, may become damp when, for example, you put pressure on them by sitting on a chairlift, or on the ground. DWR treatments are used either alone or to boost the performance of another waterproofing technology.įor the most part, the outdoor industry refers to waterproofing based on a water column test that measures water permeability under pressure. Many technical clothing items feature a durable water-repellent (DWR) finish, which causes water to bead up and roll off of the fabric surface. Water-Repellent, Water-Resistant, Waterproof ![]() ![]() Breathable/windproof performance is key for cool weather running.
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