Waterproofing and Breathability, Explained Simply
A waterproof rating around 10,000–20,000 mm resists sustained rain, while breathability ratings indicate how quickly sweat vapor escapes. But fit, fabric construction, and venting often matter more than a single number. Choose balanced performance and pair with wicking layers to keep humidity from building inside your shell during steady climbs.
Waterproofing and Breathability, Explained Simply
When the face fabric wets out, breathability plummets. Maintain your jacket’s water repellency by washing with technical cleaners and heat-setting the surface as directed. Reapply treatment when water stops beading. A well-kept DWR helps your membrane breathe, extending comfort during drizzles, squalls, and fog banks rolling in over exposed passes.