Waterproof Ratings: Mythbusting

Understanding Waterproof Ratings on Outerwear: Facts and Myths

When it comes to choosing outerwear, especially for outdoor activities, understanding waterproof ratings can be a game-changer. Waterproof ratings determine how well your jacket, pants, or gear will keep you dry in various weather conditions. However, many misconceptions surround these ratings. In this blog post, we'll dive into the nitty-gritty of waterproof ratings and debunk some common myths associated with waterproofing.

What Are Waterproof Ratings?

Waterproof ratings measure the ability of a fabric to resist water penetration. These ratings are usually expressed in millimeters (mm), indicating the amount of water pressure a fabric can withstand before leaking. Here’s a breakdown of what different ratings mean:

• 0-5,000mm: Basic water resistance, suitable for light rain and dry snow. Often found in everyday rain jackets.
• 5,000-10,000mm: Moderate water resistance, ideal for moderate rain or average snow conditions. Common in budget-friendly outerwear.
• 10,000-15,000mm: High water resistance, perfect for heavy rain and wet snow. Used in many mid-range outdoor gear.
• 15,000-20,000mm: Very high water resistance, great for prolonged exposure to heavy rain and snow. Often found in high-end gear.
• 20,000mm and above: Extreme water resistance, designed for the harshest conditions and professional-grade outerwear.

Common Myths About Waterproofing

Despite the clear standards for waterproof ratings, several myths persist. Let’s debunk some of the most common ones:

Myth 1: Higher Waterproof Ratings Always Mean Better Performance

While higher ratings indicate better resistance to water penetration, they do not always equate to better overall performance. Breathability, seam sealing, and the overall construction of the garment play crucial roles. A jacket with a 20,000mm rating but poor breathability can leave you feeling clammy and uncomfortable, especially during high-intensity activities.

Myth 2: All Waterproof Fabrics Are Breathable

Not all waterproof fabrics are breathable. Breathable fabrics are designed to allow moisture vapor (sweat) to escape while keeping external moisture out. Gore-Tex and eVent are examples of fabrics that offer both waterproofing and breathability. However, some budget waterproof materials might keep you dry from the rain but trap sweat inside, leading to discomfort.

Myth 3: Washing Destroys Waterproofing

Proper washing can maintain, and sometimes even enhance, the waterproof properties of your outerwear. Dirt, oils, and other contaminants can clog the pores of breathable fabrics, reducing their effectiveness. Using specialized cleaners and following the manufacturer's care instructions can help preserve the waterproofing. Reapplying a durable water repellent (DWR) finish after washing is often recommended to maintain performance.

Myth 4: Waterproof Means Windproof

While many waterproof jackets are also windproof, the two properties are not synonymous. Windproof fabrics prevent wind from penetrating, providing better insulation and warmth. Always check for windproof ratings if you need protection from both water and wind.

Myth 5: All Seams Are Waterproof

Even if the fabric is rated highly, the seams are potential weak points. Taped seams, where a waterproof tape is applied over the seams, are essential for preventing water ingress. Not all outerwear features fully taped seams; some might only have critical seams taped. Always check for this feature if you require full waterproof protection.

Tips for Choosing Waterproof Outerwear

1. Assess Your Needs: Consider the activities you’ll be doing and the weather conditions you’ll face. Higher ratings and breathable fabrics are essential for intense, prolonged activities in harsh conditions.

2. Look Beyond Ratings: Evaluate the overall construction, including seam sealing, zippers, and breathability features.

3. Proper Maintenance: Regularly clean and reproof your outerwear to maintain its waterproof properties.

4. Fit and Comfort: Ensure a good fit to prevent water from entering through gaps and to allow layering underneath if necessary.

Conclusion

Understanding waterproof ratings and dispelling common myths can significantly enhance your ability to choose the right outerwear for your needs. Remember, it’s not just about the numbers but the overall design and maintenance of your gear that keeps you dry and comfortable. With the right knowledge, you can confidently tackle any weather Mother Nature throws your way.