Waterproof Jacket Ratings: A Guide for Outdoor Enthusiasts
Oct 04, 2025
Choosing the right waterproof jacket can make all the difference in your outdoor adventures. Understanding waterproof ratings is essential for selecting a jacket that will keep you dry without compromising comfort. Here’s a breakdown of what you need to know about waterproof ratings and how they relate to your activities.
Understanding Waterproof Ratings
Waterproof ratings, often referred to as hydrostatic head, indicate the amount of water pressure a fabric can withstand before it begins to leak. This rating is measured in millimeters (mm). Here’s a quick guide to the different ratings:
0 – 1,500mm
Water-resistant: suitable for very light, brief showers.
1,500mm – 5,000mm
Waterproof: ideal for light to average rain and everyday use.
5,000mm – 10,000mm
Very waterproof: great for moderate to heavy rain and longer outdoor periods.
10,000mm – 20,000mm
Highly waterproof: perfect for serious hiking, backpacking, and sustained heavy rain.
20,000mm+
Designed for extreme weather conditions and serious mountain adventures.
For most people, a rating of 10,000mm is the sweet spot. It provides sufficient waterproofing for heavy rain and hiking without making you feel like you’re wearing a bin liner, a common complaint with overly waterproof jackets that lack breathability.
Consider Other Factors
While waterproof ratings are crucial, there are other factors to keep in mind when selecting a jacket:
Breathability
Look for jackets with a good breathability rating (measured in grams per square meter per 24 hours, g/m²/24h). This allows sweat to escape, preventing you from feeling clammy and uncomfortable during physical activities.
Activity Level
Match the jacket's rating to your expected level of exposure to wet weather and your exertion levels. If you’re engaging in high-intensity activities, breathability becomes even more critical.
Durability
Higher ratings and more technical fabric constructions generally offer better protection and longevity. However, these features often come at a higher price point, so consider your budget alongside your needs.
Understanding waterproof jacket ratings is vital for anyone who wants to enjoy the great outdoors without getting soaked. A 10,000mm rating like that found in the Harvakrun AI-XM 3L jacket is perfect for most people, combining excellent waterproofing with breathability. This balance ensures you can tackle various weather conditions comfortably and effectively. So, whether you’re out for a casual stroll or an intense hike, make sure your jacket is up to the task!
