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Inside The Outdoors

What does 2,000mm waterproof mean?

24.03.2015 | FAQs
Q. What Does 2,000mm Waterproof Mean?

A. All waterproof garments will be given a waterproof rating that is determined with a hydrostatic head test- most often this is expressed in mm. The higher the rating the more waterproof it is. If a garment is 2,000mm waterproof this means the fabric can withstand 2,000mm of water over a day before water will start to penetrate through. The minimum standard for a jacket to be waterproof is 1,500mm so a jacket with a waterproof rating of 2,000mm would be suitable for moderate rain.

See our Waterproof Jacket Guide for more details.


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