Waterproof · Jackets
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Waterproof Jackets Frequently Asked Questions
Many rain jackets are just highly water-resistant. This is because they need to have some breathability to allow heat and moisture to escape. They will nonetheless keep you dry in most conditions you’re likely to encounter. Heavy-duty raincoats are available which are 100% waterproof.
Yes, it is possible to get a fully waterproof jacket – these include heat-sealed seams to prevent water coming in as well as a water-resistant coating.
The waterproof level of a rain jacket is measured in terms of ‘hydrostatic head’ – the number of millimetres of vertical water pressure it can withstand. A jacket with a rating up to 5,000mm may be suitable for light rain and snow, while at 20,000mm+ you can expect to be protected from even heavy rain and wet snow under high pressure.