Performance classes, RET breathability metrics, label reading, and supplier verification for B2B buyers sourcing certified rainwear for the European market.
EN 343:2019 Waterproof Workwear: Classes, RET & Buyer’s Guide
If you are sourcing commercial waterproof workwear for the European market, EN 343 is a key European standard used to evaluate protective clothing against rain and other wet-weather conditions. However, for PPE buyers, workwear distributors, and procurement managers, simply seeing an “EN 343” tag on a quote does not tell you whether a garment meets your specific job site requirements or market compliance rules.
This guide moves past basic terminology to explain how EN 343:2019 performance classes work, how to navigate fabric versus finished garment specifications, how to verify supplier certificates, and how to select compliant rainwear from an EN 343 rainwear supplier.
Who Is This Guide For?
This practical guide is intended for PPE importers, workwear distributors, industrial safety suppliers, private-label brands, wholesalers, and procurement managers sourcing certified waterproof workwear and protective apparel for the European or UK market.
EN 343:2019 at a Glance
| Buyer Question | Quick Technical & Procurement Answer |
|---|---|
| What is EN 343:2019? | A key European standard evaluating protective clothing against rain, snow, fog, and ground moisture. |
| What are the primary metrics? | WP (Water Penetration Resistance) and RET (Water Vapour Resistance/Breathability). |
| Which class offers maximum waterproofness? | Class 4 (≥ 20,000 Pa hydrostatic pressure resistance after pre-treatment). |
| Which class offers maximum breathability? | Class 4 (RET ≤ 15 m²·Pa/W). |
| Does 5,000 mm fabric equal EN 343 Class 3? | No. Unconditioned fabric hydro-tests do not guarantee finished garment seam performance. |
| Is MVTR the same as EN 343 RET? | No. They use entirely different test methods and cannot be mathematically converted. |
| What must buyers check on test reports? | Verify the exact SKU, applicable EN 343 performance results, test conditions, and the conformity assessment documents required for the product’s PPE category. |
What Is the EN 343:2019 Standard?
EN 343:2019 (Protective clothing — Protection against rain) specifies performance requirements and laboratory test methods for rainwear materials, stitched seams, and completed protective garments.
For buyers, the most critical takeaway is understanding how EN 343 integrates into the broader regulatory framework of the European Personal Protective Equipment Regulation (EU) 2016/425:
- PPE Category I (Minimal Risks): Rainwear intended solely to protect against non-extreme atmospheric conditions generally falls under PPE Category I. The manufacturer self-declares compliance via an EU Declaration of Conformity (DoC) under Module A.
- PPE Category II & III (Higher Risks): Adding additional protective functions—such as High-Visibility (EN ISO 20471) or Flame Resistance (EN ISO 14116 / EN ISO 11612)—does not automatically determine the PPE category. The applicable category depends on the specific risks the complete garment is designed to protect against under Regulation (EU) 2016/425. For Category II or III PPE, the applicable third-party conformity assessment procedures (Module B + C for Category II; Module B + C2 or D for Category III) must be completed by an accredited Notified Body.
Sourcing EN 343 Rainwear for Your Market? As a dedicated EN 343 rainwear supplier and industrial rainwear manufacturer, PURAINGEAR manufactures commercial PU, PVC, and multi-norm protective rainwear for distributors, importers, and workwear brand owners. We support OEM orders with fully documented fabric specifications, finished garment seam-sealing, and market compliance support. Request OEM & Technical Sourcing Quote.
EN 343 Performance Classes: WP and RET
EN 343:2019 grades garment performance across two mandatory properties: Water Penetration Resistance (WP) and Water Vapour Resistance (RET), each graded on a scale from Class 1 to Class 4.
Water Penetration Resistance (WP / Waterproofness)
Water penetration resistance measures a material’s ability to withstand hydrostatic water pressure. Testing evaluates both parent fabric and finished garment seams before and after mandatory pre-treatments (including mechanical flexing, abrasion, and laundering).
| EN 343 WP Class | Minimum Pressure (WP) | Required Sample Testing Condition |
|---|---|---|
| Class 1 | ≥ 8,000 Pa (≈ 800 mm H&sub2;O) | Material in original state (unconditioned) |
| Class 2 | ≥ 8,000 Pa (≈ 800 mm H&sub2;O) | Material & seams after applicable pre-treatment |
| Class 3 | ≥ 13,000 Pa (≈ 1,300 mm H&sub2;O) | Material & seams after applicable pre-treatment |
| Class 4 | ≥ 20,000 Pa (≈ 2,000 mm H&sub2;O) | Material & seams after applicable pre-treatment |
Water Vapour Resistance (RET / Breathability)
Garment breathability is measured using the ISO 11092 sweating guarded-hotplate test. Moisture vapor resistance is expressed as RET in m²·Pa/W. Lower RET values indicate lower resistance to evaporative heat transfer, meaning higher breathability.
| EN 343 RET Class | RET Range | Comfort & Wearing Characteristics |
|---|---|---|
| Class 1 | RET > 40 m²·Pa/W | Low breathability (Restricted wearing time recommended) |
| Class 2 | 25 < RET ≤ 40 m²·Pa/W | Moderate breathability for low-intensity task work |
| Class 3 | 15 < RET ≤ 25 m²·Pa/W | Good breathability suitable for continuous active work |
| Class 4 | RET ≤ 15 m²·Pa/W | Highest breathability (Optimal comfort during high-physical exertion) |
EN 343 Class 3 vs. Class 4: What’s the Difference?
When preparing tender documents or selecting garments for a brand portfolio, understanding the distinction between Class 3 and Class 4 helps balance protection requirements against garment cost and fabric weight.
| Selection Metric | EN 343 Class 3 | EN 343 Class 4 |
|---|---|---|
| Waterproof Performance (WP) | High (≥ 13,000 Pa) | Highest (≥ 20,000 Pa) |
| Breathability Range (RET) | Good (15 < RET ≤ 25) | Excellent (RET ≤ 15) |
| Typical Target Applications | General professional outdoor work, logistics, construction, and municipal services | Higher-performance applications where greater water penetration resistance and/or lower RET is specified |
| Procurement Consideration | Highly cost-effective balance of weather protection and everyday comfort | Premium technical specification engineered for demanding environmental exposures |
How to Read an EN 343 Label
Compliant EN 343 garments display an umbrella pictogram alongside the standard number and performance scores:
[ Umbrella Pictogram ]
EN 343:2019
4 / 3 / R
│ │ └── Rain Tower Test (R = Passed, X = Not Tested)
│ └─────── Breathability Class (RET: 1 to 4)
└───────────── Waterproofness Class (WP: 1 to 4)Example: A garment labelled EN 343:2019 4 / 3 / R offers Class 4 waterproofness, Class 3 breathability, and verified full-garment water protection under optional storm tower testing (R).
Buyer Alert: An EN 343 conformity assessment applies to the specified garment model and its relevant construction, materials, and seams. Buyers should verify that the test report covers the exact garment configuration supplied under the purchase order rather than relying solely on a separate fabric specification.
Is 5,000 mm Waterproof Enough for EN 343?
A frequent purchasing query is whether a commercial fabric rating like 5,000 mm hydrostatic head is sufficient to achieve EN 343 certification.
Answer: Not necessarily. A 5,000 mm fabric hydrostatic-head rating alone does not automatically establish that the finished garment satisfies EN 343 Class 3 or Class 4 requirements.
What Buyers Should Compare
Two suppliers may both quote a 5,000 mm waterproof fabric, but the finished garments can perform differently because seam construction, seam-taping parameters, garment design, and testing conditions also directly affect waterproof performance.
For commercial procurement, raw fabric test reports cannot substitute for accredited laboratory reports performed on finished garment seams under EN 343 pre-treatment protocols.
MVTR vs. RET: What’s the Difference?
Fabrics sourced outside Europe are often quoted using Moisture Vapour Transmission Rate (MVTR or MVP) measured in g/m²/24h. However, EN 343 grades breathability using Water Vapour Resistance (RET) in m²·Pa/W.
| Parameter | MVTR / MVP | EN 343 RET |
|---|---|---|
| Measurement Unit | g/m²/24h | m²·Pa/W |
| What It Measures | Mass of water vapour passing through fabric over time | Evaporative resistance to moisture transfer |
| Scale Interpretation | Higher values indicate higher breathability | Lower values indicate higher breathability |
| Direct Conversion? | No. Testing mechanics and moisture gradients differ completely. | No. Requires skin-model hotplate testing (ISO 11092). |
Procurement Rule: When verifying EN 343 breathability compliance, never request a vendor to mathematically convert MVTR values into RET classes. Request the actual ISO 11092 test report for the finished garment.
How to Check an EN 343 Certificate Before Buying Rainwear
To prevent import delays, customs hold-ups, or uncompliant shipments, implement this 5-step checklist when auditing supplier test documentation:
- Verify Exact SKU Match: Ensure the style number or garment description on the test report precisely matches the purchase order, product spec sheet, and garment label.
- Confirm Standard Edition: Ensure the test report cites EN 343:2019 (or matches the active transition standards recognized in your import region).
- Audit Seam Testing Details: Check that water penetration resistance (WP) was conducted on stitched seams post-pre-treatment, not solely on flat fabric samples.
- Inspect PPE Categorization Documentation: For Category I Rainwear, request the supplier’s signed EU Declaration of Conformity (DoC) and factory test records under Module A. For Category II / III Multi-Norm Rainwear, request the EU Type-Examination Certificate (Module B) issued by an accredited Notified Body, along with ongoing quality monitoring documentation (Module C2 or D).
- Confirm Market Conformity Routes: Verify CE compliance for European Union imports. For Great Britain, confirm whether your product relies on valid CE recognition rules or the UKCA marking path under current GB PPE guidelines.
EN 343 and Other PPE Standards
Industrial environments frequently demand protection beyond rain resistance. Combining standards requires specialized fabric formulations and seam construction:
| Combined Hazard Requirement | Primary Industry Application | Technical Consideration |
|---|---|---|
| EN 343 + EN ISO 20471 | Highway construction, rail maintenance, logistics | Outer shell must meet chromaticity/luminance requirements alongside waterproofing. |
| EN 343 + EN ISO 14116 / 11612 | Petrochemical, oil & gas, offshore utilities | Waterproof coatings must feature flame-retardant chemistry to eliminate melt-drip risks. |
| EN 343 + Electric Arc Standards | Electrical utility linemen, substation workers | Garment assembly must resist arc thermal hazards while remaining stormproof. |
Always verify that multi-hazard garments hold certification for all listed standards rather than assuming waterproofing alone covers all workplace hazards.
PURAINGEAR Rainwear for Different Procurement Needs
As a certified rainwear manufacturer, PURAINGEAR aligns rainwear configurations directly with your industrial application and compliance requirements:
DL3026 Lightweight PU Rain Jacket
Ergonomic PU shell with heat-sealed seams for stormproof protection. Designed for active mobility and high evaporative comfort.
DL1193 Lightweight PU Rain Jacket
Engineered for high mobility and daily outdoor service work. Flexible PU coatings for active comfort.
DL3208 Hi-Vis Winter Parka
Heavy-duty thermal rainwear designed for harsh winter environments. Fluorescent outer shell with retroreflective tape.
DL1152FR Flame-Resistant Rainwear
FR protective rainwear engineered for oil & gas and utility work. Flame-retardant formulated for multi-hazard protection.
Browse Category Catalogs: Lightweight Rainwear | Heavy-Duty Rainwear | High-Visibility Workwear | FR Rainwear | OEM & Custom Sourcing
Frequently Asked Questions
Class 4 enforces higher water pressure resistance (≥ 20,000 Pa post-pre-treatment) and higher breathability (RET ≤ 15), making it the preferred choice for long-duration outdoor labor under heavy storm conditions.
No. EN 343 evaluates the finished protective garment assembly, including stitched seams, pocket construction, and closures after pre-treatments. Buyers should audit completed garment test records rather than relying solely on fabric mill specs.
You should request the manufacturer’s signed EU Declaration of Conformity (DoC), internal technical documentation, and laboratory test records verifying WP and RET performance metrics.
MVTR measures moisture mass transport (g/m²/24h), whereas RET measures evaporative thermal resistance (m²·Pa/W). Because their testing mechanics differ completely, MVTR cannot be mathematically converted into an RET score without dedicated laboratory testing.
Verify that the SKU listed matches your purchase order, check that hydrostatic pressure tests were performed on stitched seams after mechanical pre-treatment, and ensure the standard edition matches your target market’s active regulations.
Request EN 343 Sourcing Specifications & Quotations
Preparing a commercial procurement tender, expanding your workwear brand line, or sourcing EN 343 certified waterproof workwear? PURAINGEAR provides detailed technical specifications, available laboratory test documentation, and OEM manufacturing solutions tailored to your market.