What impermeability for a ski jacket?- RIDEPARK

Ski jackets have different impermeability degrees depending on their design, quality and function.Some jackets are extremely resistant to any type of bad weather, others lighter, more breathable, have more limited waterproofing.

The measurement of waterproofing with the Schmerber unit

First, the impermeability of textiles is something that is measured according to a unit called Schmerber.

This unit of measurement assesses the pressure exerted by a volume of rain on the textiles.

As an indication, when rainwater falls, the pressure is 1000 to 2000 mm or Schmerber.If your ski jacket has an equivalent Schmerber index, you can stay dry for about 1 hour.

Ski clothing manufacturers, and in particular ski jackets generally indicate this information on the label or the small manual accompanying the product in question.

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Here is a summary table to get a quick idea of the waterproofing of a jacket.

The higher the Schmerber index, the more the jacket guarantees you good impermeability.

Impermeability according to ski practice

Depending on your ski practice you don't need the same level of impermeability.For a classic practice on track, and in time not too humid (no rain, no wet snow), medium or correct impermeability is less than 10,000 mm is sufficient.

If you plan to get out of the track, a powdery snow skier and expose yourself to changing land, random weather, without being able to find a shelter quickly, then it is desirable to turn to a jacket with waterproofing greater than 15000 mm.You will enjoy good comfort in bad weather for about a few hours.

If you go for more than half a day, on hiking, on foot or in skiing, plan a good quality jacket and excellent waterproofing.So more than 15,000 - 20,000 mm.It will protect you effectively in case of bad weather.

In all winter and ski sports practices, the use of the jacket and textiles is different, and the solicitation of these textiles is different.A textile which is subjected to a pressure (for example at the shoulder level), or at the level of the seams of a backpack ramp, loses in impermeability.The textile being distorted, its waterproof quality degrades.

Finishes and light closures

Beyond the quality of textiles, it is important to look at the finishes, the quality of the seams and collages between the different textile pieces.The same goes for light closures.They must be sealized to perfect the general waterproofing of your ski outfit.

to summarize

The importance of the impermeability of a ski jacket is dependent on your practice and the expected weather conditions.

The Schermber index is there to provide a scale and be able to quickly compare textiles.But beyond textiles, check the general quality of the ski jacket, including closings and seams.