Waterproof Ratings

 

Waterproof ratings are essential for evaluating the effectiveness of outdoor jackets in protecting against moisture. These ratings are typically expressed in millimeters (mm) and indicate the amount of water pressure a fabric can withstand before it begins to leak. The higher the number, the more waterproof the jacket is considered to be.

For instance, a jacket with a waterproof rating of 5,000 mm can withstand the pressure of a 5-meter column of water. This level of protection is generally suitable for light rain and occasional wet conditions. In contrast, jackets rated at 10,000 mm or higher are designed for more extreme weather conditions, such as heavy rain or prolonged exposure to wet environments.

In addition to waterproof ratings, it is important to consider breathability, which is measured in grams (g) and indicates how much moisture vapour can escape from the inside of the jacket. A common measurement is the "g/m²/24h" standard, which reflects the amount of water vapour that can pass through one square meter of fabric in a 24-hour period. A higher breathability rating, such as 20,000 g/m²/24h, allows for better moisture management, keeping the wearer dry from sweat while providing protection from external moisture.

When selecting a waterproof jacket, it is crucial to assess both the waterproof rating and breathability to ensure optimal comfort and performance. For example, a jacket with a waterproof rating of 15,000 mm and a breathability rating of 10,000 g/m²/24h is ideal for activities such as hiking or skiing, where both waterproof protection and moisture management are necessary.

Moreover, the construction of the jacket plays a significant role in its overall waterproof capabilities. Features such as sealed seams, waterproof zippers, and durable water repellent (DWR) coatings enhance the jacket's ability to resist water penetration. It is advisable to look for jackets that incorporate these elements, as they contribute to the longevity and effectiveness of the waterproofing.

In summary, understanding jacket waterproof ratings is vital for making informed decisions when purchasing outdoor apparel. By considering both the waterproof and breathability ratings, along with additional construction features, consumers can select jackets that meet their specific needs for outdoor activities in varying weather conditions.

For more information, read our blog: Waterproof Jackets – Busting through the Jargon