No, 10,000mm is not considered "very waterproof" for most outdoor gear. While it offers decent protection against moderate rain and snow, it’s more accurately described as water-resistant. For true waterproofing in extreme conditions, look for ratings of 20,000mm or higher.
Understanding Waterproof Ratings: What Does 10,000mm Really Mean?
When you see a waterproof rating like "10,000mm" on a jacket, tent, or pair of pants, it refers to the hydrostatic head test. This test measures the amount of water pressure a fabric can withstand before it starts to leak. Essentially, a 10,000mm rating means that a column of water 10,000 millimeters (or about 33 feet) high could be placed on the fabric without water penetrating it.
This rating is a good starting point for understanding a product’s water resistance. However, it’s crucial to remember that real-world conditions are dynamic. Wind, abrasion, and prolonged exposure to heavy rain can push the limits of even higher waterproof ratings.
Is 10,000mm Waterproof Enough for Hiking?
For casual day hikes in light to moderate rain, a 10,000mm rated item can be sufficient. It will keep you dry during a typical shower. However, if you’re planning extended treks, facing unpredictable mountain weather, or participating in activities where you’ll be in constant contact with moisture, you’ll likely want something more robust.
Consider these scenarios:
- Light Drizzle: 10,000mm is generally adequate.
- Moderate Rain: It will hold up for a while, but prolonged exposure might lead to dampness.
- Heavy Downpours or Snow: You will likely get wet.
- Activities with High Abrasion: Like bushwhacking or crawling, can compromise the fabric’s integrity faster.
What’s a Better Waterproof Rating for Serious Outdoor Adventures?
When your adventures demand reliable protection, look for ratings of 20,000mm and above. These higher ratings indicate fabrics that can withstand significantly more water pressure. For extreme conditions, such as mountaineering, extended expeditions in wet climates, or activities like skiing and snowboarding in heavy snowfall, ratings of 30,000mm or even 40,000mm offer superior peace of mind.
Here’s a general guide:
| Activity/Condition | Recommended Waterproof Rating (mm) |
|---|---|
| Light rain, casual use | 5,000 – 10,000 |
| Moderate rain, day hiking | 10,000 – 15,000 |
| Heavy rain, multi-day treks | 15,000 – 20,000 |
| Extreme weather, mountaineering | 20,000+ |
Beyond the Millimeters: Other Factors for Waterproof Gear
While the millimeter rating is important, it’s not the only factor determining how waterproof your gear will be. Several other elements contribute to its overall performance:
- Breathability: A fabric can be waterproof but trap sweat inside, making you feel clammy. Look for breathable waterproof membranes (like Gore-Tex or eVent) that allow moisture vapor to escape. This is often measured in g/m²/24hr.
- Sealed Seams: Even the most waterproof fabric will leak if the seams aren’t properly sealed. Taped seams prevent water from seeping through the needle holes.
- DWR (Durable Water Repellent) Finish: This is a coating applied to the outside of the fabric. It causes water to bead up and roll off. While DWR isn’t the primary waterproofing, it’s essential for maintaining breathability and preventing the outer fabric from "wetting out."
- Construction and Design: Features like storm flaps over zippers, adjustable cuffs, and hoods all play a role in keeping water out.
When is 10,000mm a Good Choice?
Despite its limitations in extreme conditions, a 10,000mm waterproof rating is perfectly suitable for many everyday uses and less demanding outdoor activities. It strikes a good balance between protection, breathability, and cost.
Consider 10,000mm for:
- Everyday rain jackets: For commuting or walking the dog.
- Lightweight rain pants: For occasional showers during less intense outdoor pursuits.
- Tents and tarps: For fair-weather camping where heavy rain is unlikely.
- Ski and snowboard jackets: For milder winter conditions or if you prioritize breathability over absolute waterproofing.
How to Maintain Your Gear’s Waterproofness
Regardless of the rating, proper care will extend the life and performance of your waterproof gear.
- Clean Regularly: Dirt and oils can clog the membrane and degrade the DWR. Use a technical cleaner specifically designed for outdoor gear.
- Reapply DWR: Over time, the DWR finish wears off. You can easily reapply it using spray-on or wash-in treatments.
- Wash Properly: Follow the manufacturer’s instructions, usually involving a gentle cycle with minimal detergent and no fabric softener.
- Dry Correctly: Air dry or tumble dry on low heat (check care labels) to reactivate the DWR.
People Also Ask
### What is considered good waterproofness for a jacket?
Good waterproofness for a jacket generally starts at 15,000mm and goes up from there. While 10,000mm offers decent water resistance for light rain, ratings of 15,000mm to 20,000mm are considered good for moderate to heavy rain, making them suitable for most hiking and outdoor activities. For extreme conditions, look for 20,000mm+.
### Can you get wet through 10,000mm waterproof fabric?
Yes, you can get wet through 10,000mm waterproof fabric, especially during prolonged exposure to heavy rain, under significant water pressure, or if the fabric is compromised. While it offers good protection against light to moderate showers, it’s not designed for the most extreme weather conditions.
### What is the difference between waterproof and water-resistant?
Water-resistant means a material can repel water to a certain extent, offering protection against light moisture. Waterproof means a material is designed to prevent water from passing through it, even under considerable pressure, and typically involves higher hydrostatic head ratings and sealed seams. A 10,000mm rating falls into the highly water-resistant category.