How to Choose a Good Waterproof Jacket: Understanding mm Ratings
Learn how many mm you need in a waterproof jacket for optimal protection in extreme weather conditions.
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A good waterproof jacket should have a minimum waterproof rating of 5,000 mm, but for more extreme weather conditions, look for ratings between 10,000 mm to 20,000 mm. This rating indicates the height of the water column the fabric can withstand before leaking.
FAQs & Answers
- What does a waterproof rating mean? A waterproof rating indicates the water pressure the fabric can withstand before leaking, measured in millimeters (mm) of a water column.
- What is the difference between waterproof and water-resistant? Waterproof jackets are designed to keep water out entirely, while water-resistant jackets can repel light rain but may not withstand heavy downpours.
- How do I choose the right waterproof jacket for hiking? Choose a jacket with a waterproof rating of at least 10,000 mm for hiking in wet conditions, along with features like breathability and ventilation.
- Can I wash my waterproof jacket? Yes, but you should follow the manufacturer's care instructions, as washing can affect the waterproof coating.