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Waterproof rating (mm hydrostatic head) explained for jackets and tents: what the number survives, the 10,000mm threshold, tent floor vs flysheet, and why seams matter.
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1 guides · facts & specs only
1 guides · facts & specs only
Waterproof rating (mm hydrostatic head) explained for jackets and tents: what the number survives, the 10,000mm threshold, tent floor vs flysheet, and why seams matter.
Read guide →