When we say waterproof

When we say waterproof

On the descriptions of many of our jackets, pants and overalls you can read that our gear is 100% waterproof and can withstand a 45 000 mm water column test. Sounds fancy! Right?! But what does that really mean. 

Well a water column, or water column pressure is a way of measuring on how much pressure a material can withstand before it starts to let water trough and both you and the material gets wet. Picture this: You have a jacket, and on that jacket you place a cylinder. You start to fill that cylinder up with water. And when the water reaches 10 000 mm = 10 meters, the water start to pass trough the jacket. In other words, this jacket has a water column of 10 000 mm and is classified as waterproof in light rain or moderate snow.  

The scale is roughly this: 

Waterproof Rating (mm)

Water Resistance Provided

Conditions

0 - 5 000 mm

No resistance to some resistance to moisture.

Light rain, dry snow, no pressure.

6 000 - 10 000 mm

Rainproof and waterproof under light pressure.

Light rain, average snow, light pressure.

11 000 - 15 000 mm

Rainproof and waterproof except under high pressure.

Moderate rain, average snow, light pressure.

16 000 - 20 000 mm

Rainproof and waterproof under high pressure.

Heavy rain, wet snow, some pressure. Think PNW.

20 000 mm - 40 000 mm

This offers an excellent storm level protection.

Heavy rain, wet snow, high pressure, storm

40 000 mm +

The material in the clothing will not fail. In fact, it will break from usage before letting water in.

Very Heavy rain, wet snow, high pressure, storm, harsh conditions

Do you know where we are on this scale? Our Monosuits, the overalls that is, and many of the jackets and pants has a water column of 45 000 mm. This means that you can be in the middle of a monsoon for 3 hours, and you won’t get wet. Now that is waterproof.