how to tell if jacket is waterproof

3 min read 22-01-2025

Meta Description: Unsure if your jacket truly repels water? This comprehensive guide reveals foolproof methods to test your jacket's waterproofness, from simple at-home checks to advanced assessments. Learn how to identify waterproof, water-resistant, and other fabric treatments and choose the right jacket for your needs!

Understanding Waterproofing Terminology

Before we dive into testing, let's clarify some key terms. Many jackets boast water-resistant properties, but this isn't the same as being waterproof.

Waterproof vs. Water-Resistant

Waterproof: A truly waterproof jacket will completely prevent water from penetrating the fabric. It's designed to withstand heavy rain and even submersion (depending on the design).
Water-resistant: A water-resistant jacket repels light rain and splashes. However, prolonged exposure to heavy downpours will eventually lead to water penetration.
Water-repellent: This is a surface treatment that causes water to bead up and roll off. It's the weakest form of water protection and wears off over time.

How to Test Your Jacket's Waterproofing

There are several ways to check if your jacket is truly waterproof, ranging from simple home tests to more rigorous methods.

1. The Shower Test (At-Home Method)

This is a quick and easy way to get a general idea.

Method: Hold the jacket under a warm shower for a few minutes. Focus on areas like the seams and zippers.
Result: If water beads up and rolls off, the jacket's outer layer is likely water-resistant. However, look for any areas where water starts to soak through. This indicates a problem with waterproofing. This test primarily checks the water-repellent finish, not full waterproofing.

2. The Spray Bottle Test (At-Home Method)

A more targeted approach than the shower test.

Method: Fill a spray bottle with water. Spray the jacket from a close distance, focusing again on seams and zippers.
Result: Observe how the water reacts. Does it bead up? Does it soak into the fabric? Are there any areas that show significant water penetration? This provides another check for the water-repellent coating.

3. The Hanging Test (At-Home Method for assessing breathability)

This test is less about waterproofing and more about checking the breathability of the jacket. It's particularly useful if you need a jacket for intense physical activity.

Method: Wear the jacket inside out, and hang it in a room at a moderately warm temperature for a few hours.
Result: Check for any moisture build-up on the inner side of the jacket. Excessive moisture buildup suggests poor breathability which means that the jacket might not be ideal for activities that cause sweating.

4. The Professional Hydrostatic Head Test (Lab Method)

For a truly definitive assessment, you'll need to have a hydrostatic head test done.

Method: This test measures the water pressure a fabric can withstand before water penetration occurs. Specialized equipment is needed.
Result: The result is measured in millimeters (mm) of water column pressure. Higher numbers indicate greater waterproofness. A rating of 10,000 mm or more generally signifies a fully waterproof jacket, suitable for heavy rain. Many reputable outdoor brands will list this specification.

5. Check the Jacket's Labeling and Care Instructions

The manufacturer’s label often provides clues to a jacket's waterproofness.

Look for: Terms like "waterproof," "water-resistant," or specific waterproofing technologies (e.g., Gore-Tex, eVent). Check the care instructions; washing instructions can sometimes reveal treatment details.

Choosing the Right Jacket for Your Needs

The best type of jacket for you depends on your activity level and climate.

For light rain and splashes: A water-resistant or water-repellent jacket will suffice.
For heavy rain and outdoor adventures: Invest in a truly waterproof jacket with a high hydrostatic head rating.

Remember to consider breathability as well, especially for activities like hiking or skiing. Look for jackets that utilize breathable waterproof membranes. If your jacket doesn't pass your tests, you might want to look into waterproofing sprays or professional reproofing services.

By following these tips, you'll be able to determine if your jacket truly lives up to its waterproof claims.