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The Technical Guide from The manufacturers

Event Fabric

Sweating is a natural process, part of what you could call the natural air conditioning of the human body. When we exercise our muscles produce heat. The body must stay at a homeostatic or steady-state of temperature, therefore it must find a way to cool itself. We balance our core temperature by sweating. Sweating essentially balances our body temperature by evaporative cooling.

Avoid The boiler effect

To support our "human air conditioning" waterproof fabrics must let the sweat out. If you sweat more than the fabric can handle, two things happen:

• 1) Simultaneously the air inside your jacket heats up, while its relative humidity reaches 100%.
• 2) Evaporative heat loss (your human air conditioning) becomes ineffective, which means your body's ability to balance its temperature is compromised.

As a result you overheat. We call this the boiler effect. Eventually you soak in your own sweat - the sweat that is trying to cool you down. Worse, when you stop exercising all that sweat inside your jacket, boots and gloves makes you feel cold and miserable. The physiological experts call it "post-exercise chill." Sound familiar?

How Much do we sweat

All humans sweat. A lot. Especially athletes. Humans simply walking produce 0.25 to 0.5 liters of sweat per hour, and up to 1.5 liters during strenuous activity. All this sweat has to move through your clothing system, your gloves, and your footwear.

The Truth is

If you're wet, you're miserable. If you're dry, you're comfortable. eVent fabrics allow sweat to quickly evaporate to the outside, keeping you dry on the inside.

Why Switch to Event fabrics

Because eVent fabrics lets sweat escape up to twice as fast as common waterproof/breathables. eVent fabrics let the sweat out.™

Event Fabrics direct venting technology

eVent fabrics get their unique properties from a proprietary and patented waterproof membrane. Its unique composition allows millions of tiny pores to breathe at their full potential. Sweat vents directly to the outside of the fabric in one easy step. We call this Direct Venting™ Technology. Its genius is hidden in its simplicity. eVent fabrics simply let the sweat out.™

Forerunners:PU membrane technology

Most common waterproof/breathable technologies do not literally "breathe". Instead they move sweat in two slow steps by a process of diffusion through a Polyurethane (PU) layer. First sweat is condensed and absorbed into the PU layer on the inside of the fabric. Because PU absorbs and retains sweat, the inside of the fabric becomes wet. Then, body heat begins to push that dampness through to the outside of the fabric where it can finally evaporate - a very inefficient process.

Lab test results

We could mention the exceptionally low "Water Vapor Resistance" (RET) of eVent fabrics. Or, we could talk about how much higher our "Moisture Vapor Transmission Rates" (MVTR) are in laboratory tests. But, do you run in the lab? Do you ice climb inside a climate chamber? The bottom line is decided in the field. Out there it's a black and white world: you're either wet or dry. You either soak in your own sweat, or not. It's that simple. eVent fabrics let the sweat out.™

Event Windproof fabric and Event waterproof fabric

All eVent fabrics protect you from the wind. And, all eVent fabrics provide you with sweat-free comfort through our unique Direct Venting™ Technology. Garments, gloves and footwear made with eVent Waterproof fabric add another level of protection. Patented surface treatments and fabrication methods keep out water - even hard-driving rains - without blocking those millions of tiny pores that let the sweat out.™.

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