2,000mm is NOT how much area of your jacket is waterproofed! 2,000mm is actually a rating they use after they test a section of material using a water column test. They keep adding water until some leaks through the material, and 2,000 is the amount of water that the material can handle, so yes, a jacket thats 15000mm IS much better. I think the mm is millimeters, so the water column would be 2000mms tall by the time the water leaks through. is this making sense?
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