As the saying goes, "There's no such thing as bad weather, only unsuitable clothing." If you've ever experienced the discomfort firsthand, you'll understand how important it is to choose outdoor gear that can withstand harsh weather while providing comfort, allowing you to fully enjoy outdoor activities.

Waterproof ratings and breathability work together to help you understand the protective capabilities and comfort of your gear. This blog post will delve into these two indicators, giving you the knowledge to choose outdoor gear that combines protection and comfort regardless of the weather.

Understanding Waterproof Fabric Ratings

Waterproof ratings quantify the waterproof protection provided by a piece of equipment. The required waterproof capability varies depending on the outdoor activity. In most cases, this value is set according to official standards or industry-standard indicators, representing the minimum amount of water a garment can withstand.

This section will explain how waterproof ratings are determined and the key points to consider when purchasing waterproof clothing.

How are Waterproof Ratings Determined?

Outdoor gear and its specialized fabrics typically undergo a series of tests to ensure they can withstand various weather conditions. Water pressure testing is one of the most common testing methods. The waterproof performance of a fabric is determined by its water pressure rating, which measures the maximum water pressure the fabric can withstand before water begins to seep in. A higher water pressure rating indicates stronger water resistance and a higher waterproof level.

How is water pressure measured?

Generally, for clothing to meet waterproof standards, the water pressure test result must be at least 10 meters (10,000 millimeters). Water pressure is measured in two main ways: hydrostatic pressure testing and hydrostatic pressure testing.

The degree of waterproofness is tested using hydrostatic pressure testing, which calculates the fabric's ability to resist water penetration. The test uses a water pipe marked with vertical millimeter graduations. The fabric is fixed to one end of the pipe, and water is continuously added, increasing the pressure on the fabric. When water droplets begin to seep from the fabric surface, it means the fabric's waterproof limit has been reached. The number of millimeters displayed on the pipe at this point is the fabric's water pressure rating.

Which waterproof rating is most suitable?

Simply put, it depends on the intended use. When choosing waterproof clothing, several factors need to be considered, including typical weather conditions, activity intensity, and duration. If you plan to spend a whole day in the countryside or mountains, or if snow is forecast for your mountain activities, choosing high-waterproof gear will keep you dry for longer. Conversely, for short jogs or dog walks, a medium to low waterproof rating is sufficient.

When assessing waterproof ratings, it's also essential to consider breathability to ensure that the clothing you choose is suitable for your activity type and environment. Waterproofing and breathability work together to create high-performance, practical gear that provides excellent protection while maintaining exceptional comfort.

Understanding Breathability Ratings
What is Breathability?

The breathability of outdoor clothing refers to how easily water vapor and body heat dissipate from the inside of the garment to the outside. When skiing in the countryside or cycling in cold weather, you don't want to be soaked in sweat, which is not only uncomfortable but also increases the risk of hypothermia in low temperatures. Good breathability keeps you comfortable during outdoor activities of all intensity.

How do waterproofing and breathability work together?

Whether skiing in the countryside or hiking in the summer monsoon season, waterproofing and breathability work together to maintain your comfort. A waterproof layer blocks wind and rain, protecting you from harsh weather, while a breathable design wicks away trapped moisture, keeping you dry.

How to Choose the Right Water Pressure and Breathability Rating
Protecting yourself from the effects of weather is key to enhancing comfort and the overall experience of outdoor activities. Choosing the right jacket based on your needs will allow you to withstand the weather and extend your time outdoors. Next time you buy an outdoor jacket, consider these principles to select gear that keeps you dry and comfortable.