European Standard for Rain Protection in PPE Garments (EN 343)
Protective garments designed for rain, snow, fog, and ground moisture must comply with EN 343, the European standard for weather protection. In practice, this regulation evaluates both fabric and seam performance under wet conditions. Specifically, garments are tested for waterproofness as well as breathability to ensure long-term wearer comfort. As a result, certified PPE delivers dependable protection in demanding outdoor and industrial environments.
Waterproofness Classification Under EN 343
Under EN 343, resistance to water penetration is assessed across both the outer fabric and the seams. For example, materials are exposed to controlled water pressure to verify leak resistance. Moreover, performance is grouped into three protection levels. Consequently, higher classifications indicate stronger protection against prolonged rain exposure.
EN 343 Waterproofness Classes Explained
Class 1: Basic rain protection for light-duty tasks
Class 2: Moderate water resistance for routine outdoor work
Class 3: High-performance waterproof protection for heavy rain and severe conditions
Breathability Performance Under EN 343
Breathability reflects how efficiently moisture vapour escapes from inside the garment. Therefore, it plays a critical role in maintaining thermal comfort during long working hours. In addition, higher breathability levels reduce sweat accumulation. As a result, well-ventilated PPE supports productivity in physically demanding environments.
EN 343 Breathability Classes Explained
Class 1: Low breathability for short-duration use
Class 2: Moderate breathability for intermittent activity
Class 3: High breathability for continuous wear
Waterproof Testing Method – EN 20811 (Hydrostatic Head)
Waterproof performance is also measured using EN 20811, which determines how much water pressure a fabric can withstand before leakage occurs. For instance, results are reported in millimetres of water column (mmH₂O) or Pascals (Pa). Furthermore, higher values indicate stronger resistance to driving rain and moisture penetration.
Interpreting Hydrostatic Head Ratings
Above 5,000 mm (50,000 Pa): Generally regarded as waterproof and windproof
Above 10,000 mm: Suitable for premium outdoor and industrial rainwear
Lined vs Unlined Rainwear – Performance Comparison
Lining materials significantly influence moisture management and wearer comfort. In contrast, unlined garments tend to retain more internal humidity. Therefore, the addition of lining improves water vapour transmission. As a result, lined garments typically achieve higher breathability classifications under EN 343.
EN 343 Performance Class Comparison (Lined vs Unlined)
Garment Type Waterproofness Breathability EN 343 Rating
Lined Rainwear High High Class 3:3
Unlined Rainwear High Low Class 3:1
Why EN 343 Certification Matters for Professional Workwear
EN 343 certification confirms that garments meet independently tested performance criteria. Moreover, it verifies that both fabrics and seams resist water penetration. Additionally, certified PPE supports thermal comfort through efficient moisture release. Consequently, workers benefit from safer and more durable rain protection in real-world working conditions.
FAQs – EN 343 Rain Protection Standard
What does EN 343 Class 3:3 mean?
EN 343 Class 3:3 represents the highest performance level for both waterproofness and breathability. Therefore, this rating is recommended for prolonged exposure to heavy rain. In addition, it is suitable for high-activity professional environments.
Is 5,000 mm waterproof rating suitable for workwear?
A waterproof rating above 5,000 mm provides reliable rain protection for most outdoor work. However, premium workwear often exceeds 10,000 mm for extreme conditions. Consequently, higher ratings deliver greater durability under continuous rainfall.
Are seams tested under EN 343?
Yes, EN 343 requires seam sealing performance to be tested alongside fabric waterproofness. As a result, water ingress is controlled across stitched areas. Furthermore, seam testing ensures complete garment integrity in wet environments.
Why are lined jackets more breathable than unlined ones?
Lined jackets reduce water vapour resistance. Therefore, perspiration escapes more efficiently during physical activity. As a result, wearer comfort improves without reducing waterproof protection.
Is EN 20811 the same as EN 343?
No, EN 20811 is a laboratory test method. In contrast, EN 343 is the PPE performance classification standard. Therefore, EN 20811 provides measurement data, while EN 343 defines compliance levels.