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24 July 2026
Hydrostatic Head Test: How We Know a Waterproof Jacket Works
"Waterproof" is one of the most-used words on an outdoor gear label, and one of the least understood. Behind every genuine waterproof rating sits a real piece of science. A specific test, run under controlled conditions, that tells you exactly how much your gear can take before water gets through.
24 July 2026
Hydrostatic Head Test: How We Know a Waterproof Jacket Works
"Waterproof" is one of the most-used words on an outdoor gear label, and one of the least understood. Behind every genuine waterproof rating sits a real piece of science. A specific test, run under controlled conditions, that tells you exactly how much your gear can take before water gets through.
