Outdoor work: why is the EN 343 standard essential?

Worker wearing a green waterproof and breathable PROS Wear jacket model 285Working in heavy rain or in a moisture-saturated environment exposes professionals to real risks. A garment that claims to be "waterproof" without serious certification will always end up absorbing water, weighing down the gear and cooling the body. This stagnant moisture not only causes major discomfort but also reduces alertness and can lead to cold-related illnesses. On a construction site or in operations, poor weather protection is a costly mistake in terms of efficiency and health.

At PROS Wear, we leave nothing to chance. The EN 343 standard is our benchmark to ensure your rainwear is a true technical shield.

What is the EN 343 standard?

The European EN 343 standard defines the requirements applicable to protective clothing against precipitation (rain, snow), fog, and ground moisture.

EN 343 standard pictogram
  • Water penetration resistance (a): Measures the waterproofness of the fabric and seams under the pressure of a water column.
  • Evaporative resistance (b): Measures the garment’s ability to wick away sweat (breathability).
  • Tear resistance: A certified garment must withstand the mechanical stresses of the work environment.

Understanding protection classes

Since the 2019 update of the standard, there are now 4 performance classes. The higher the number, the better the garment performs.

Waterproofness (the top number)

  • Class 1: Minimal protection, for very short use.
  • Class 3 or 4: Essential for professionals exposed all day long.

Our clothing in PVC fabric with high-frequency welded seams reach the highest levels of waterproofing.

Breathability (the bottom number)

  • Class 1 is low breathability (risk of internal condensation).
  • Class 4 offers optimal comfort for physically demanding work, avoiding the "sauna" effect inside the jacket.

Our clothing in breathable fabric with high-frequency welded seams reach the highest levels of breathability.

Close-up of the EN 343 pictogram inside our PROS Wear rain jacket

Why require this standard?

Purchasing EN 343 certified equipment is a strategic investment.

  • Legal compliance: You meet safety obligations to protect your employees from weather risks.
  • Durability: A certified garment is tested to withstand washing cycles and abrasion without losing its properties.
  • Productivity: A dry worker is a focused worker who doesn’t suffer through their workday.

💡 Expert advice

Watch out for seams: A fabric can be EN 343 certified, but if the seams are not waterproof, the garment will let water in. For maximum protection, always check that your gear uses high-frequency welded seams. This is the only technology that guarantees the junction area is as waterproof as the fabric itself.

Conclusion: Make no compromises on waterproofing

The EN 343 standard is not just a logo on a label. It is your only guarantee against leaks and cold. By choosing tested and approved equipment, you ensure the continuity of your activities, no matter the weather conditions.

Secure your protection now!

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