For a safety-footwear importer, reading a product label is not as simple as choosing the highest number. EN ISO 20345 safety categories describe different combinations of construction and protective properties. S3 is not automatically the right choice for every job, and S7S is not automatically “safer” for every workplace. The correct specification begins with a risk assessment, then matches the required category, optional markings, exact product configuration and destination-market documents.
This guide explains the current category system in practical purchasing language. It is written for PPE importers, industrial distributors, private-label brands and procurement managers who need to compare quotations, approve samples and prevent a certificate from being applied to the wrong shoe.
Quick Answer: What Should a Buyer Specify?
Do not send an RFQ that only says “CE safety shoes” or “S3 boots.” State the complete target marking, intended workplace, outsole and upper requirements, puncture-resistant insert type, size range and target market. Then ask the supplier to match the production sample, bill of materials, label, test report and certificate to that exact configuration.
A practical starting point is:
- Dry indoor work: assess whether a Class I S1 configuration is suitable.
- Sharp-object risk: add the appropriate P, PL or PS puncture-resistance option.
- Wet outdoor work: assess S2 or an S3 variant for Class I footwear.
- Whole-footwear water resistance: assess S6 or an S7 variant.
- Mud, washdown or standing water: assess a Class II S4 or S5 variant.
These are selection prompts, not a substitute for a workplace risk assessment or local PPE law.
Which Edition Applies in 2026?
The international base document is ISO 20345:2021, together with Amendment 1:2024. Its European adoption is commonly written as EN ISO 20345:2022+A1:2024. As of August 2026, the European edition and amendment are listed in the EU’s current harmonised-standards decision for PPE, Commission Implementing Decision (EU) 2026/1279.
The date matters. Older certificates and labels may use EN ISO 20345:2011 terms such as SRA, SRB, SRC or WRU. Those markings should not be mixed with the current system. An older marking is not automatically fraudulent, but the importer should verify the certificate’s standard edition, validity, exact model and permitted transition arrangements.
EN ISO 20345 is a product standard, not an automatic “CE certificate.” For the EU market, safety footwear must also follow PPE Regulation (EU) 2016/425, including the applicable conformity-assessment route, technical documentation, EU Declaration of Conformity, product information, traceability and CE marking. A harmonised standard can support a presumption of conformity for the requirements it covers; a laboratory report alone does not complete the regulatory process.
For wider market context, see Litai’s international safety-footwear standards guide and CE marking guide for safety boots.
Class I vs Class II Safety Footwear
Before comparing EN ISO 20345 safety categories, identify the construction class:
- Class I: footwear made from leather or other materials, excluding all-rubber and all-polymeric footwear. Many stitched or cemented leather safety shoes and boots are in this class.
- Class II: all-rubber vulcanised or all-polymeric moulded footwear. PVC, PU and rubber safety rain boots are typical examples.
These are footwear construction classes; they must not be confused with the EU PPE risk categories used for conformity assessment. The current standard also recognises hybrid footwear, so a buyer should not classify an unfamiliar construction by appearance alone. The construction stated in the technical file and test documentation should control the decision.
EN ISO 20345 Safety Categories: SB and S1–S7
Every category builds on the basic safety-footwear requirements represented by SB, including a protective toe cap tested for 200 J impact and 15 kN compression. Higher category numbers represent specified combinations of properties; they are not a universal ranking of protection.
| Category | Construction | What the marking adds | Typical buyer question |
|---|---|---|---|
| SB | Class I or II | Basic safety-footwear requirements | Which additional risks must the shoe address? |
| S1 | Class I | SB + closed heel + antistatic properties (A) + heel energy absorption (E) | Is the workplace mainly dry and indoor? |
| S1P / S1PL / S1PS | Class I | S1 plus the stated type of puncture-resistant insert | Which nail test and insert construction does the risk assessment require? |
| S2 | Class I | S1 + upper water penetration and absorption resistance (WPA) | Is upper-material water resistance enough, or is whole-footwear WR needed? |
| S3 / S3L / S3S | Class I | S2 + P, PL or PS puncture resistance + cleated outsole | Which puncture code appears on the certificate and final label? |
| S4 | Class II | SB + closed heel + antistatic properties + heel energy absorption | Does a moulded waterproof work environment require puncture resistance too? |
| S5 / S5L / S5S | Class II | S4 + P, PL or PS puncture resistance + cleated outsole | Is the tested insert identical to the production specification? |
| S6 | Class I | S2 + whole-footwear water resistance (WR) | Has the complete footwear passed the WR requirement? |
| S7 / S7L / S7S | Class I | Corresponding S3, S3L or S3S properties + WR | Are both the puncture code and whole-footwear WR documented? |
For example, S7S is a specific combination of Class I construction, WPA, whole-footwear WR, a cleated outsole and PS-type non-metallic puncture resistance. It may be appropriate for a wet outdoor risk profile, but an all-polymeric boot for standing water would be assessed differently.
P, PL and PS Are Not Interchangeable
The suffix after an S1, S3, S5 or S7 category identifies the puncture-resistant insert route:
- P: a metallic penetration-resistant insert tested with a 4.5 mm test nail and a required resistance of at least 1,100 N.
- PL: a non-metallic insert tested with a 4.5 mm test nail, with no penetration at 1,100 N.
- PS: a non-metallic insert tested with a smaller 3.0 mm test nail; the mean penetration force must be at least 1,100 N and no individual result may be below 950 N.
The “L” in PL does not mean light or large, and the final “S” in S3S does not mean steel or slip resistance. A material description such as “Kevlar midsole” also does not prove PL or PS performance. Ask for the completed footwear marking and the report covering the approved insert, outsole, last, size range and construction.
WPA Is Not the Same as WR
This distinction prevents many specification errors. WPA concerns water penetration and absorption of upper materials. It does not mean the complete shoe is waterproof. WR concerns water resistance of the whole footwear and is included in S6 and S7 variants.
A distributor serving landscaping crews, for example, should not assume that an S2 shoe can replace an S6 product in prolonged wet conditions. Conversely, a buyer may not need whole-footwear WR for a dry warehouse merely because a higher category sounds more marketable. Fit the claim to the actual use and validate it in the correct test configuration.
SR, FO and Other Optional Markings
The current standard’s basic slip test uses ceramic tile with a sodium lauryl sulfate solution and normally carries no extra letter. The optional SR marking adds a ceramic-tile-and-glycerine test. This system should not be translated directly into the old SRA/SRB/SRC scheme, so “SR equals SRC” is inaccurate. Check the standard edition on the label and certificate before comparing two quotations.
FO, outsole resistance to fuel oil, is optional under the current edition; it should not be inferred from any S category alone. Other optional markings may include LG for ladder grip, SC for scuff-cap abrasion, HRO for contact heat, HI or CI for heat or cold insulation, M for metatarsal protection, AN for ankle protection and CR for cut resistance.
Electrical claims require extra care. “A” means antistatic; it does not mean ESD footwear and does not provide electrical insulation for live work. A buyer should specify the electrical risk separately and use the applicable standard and test documentation.
Choose the Category from the Workplace Risk
A competent buyer converts the workplace hazard assessment into measurable purchasing requirements:
- Construction and heavy machinery: assess toe protection, puncture risk, outsole grip, abrasion, ankle support and outdoor water exposure together.
- Warehousing and logistics: balance protection with weight, flexing, fit, floor conditions and all-day comfort.
- Agriculture and food processing: evaluate standing water, mud, washdown, chemical contact, hygiene and Class II moulded construction.
- Oil, gas and chemical sites: specify outsole resistance, slip conditions, electrostatic requirements and chemical exposure rather than relying on the S code alone.
- Cold, heat or specialist hazards: add the relevant optional requirements or specialist standards; general-purpose EN ISO 20345 safety categories do not cover every risk.
Give the supplier a hazard matrix and intended environment. That produces a more reliable sample than asking the factory to choose “the best category” without context.
Importer Documentation Checklist
Before approving production, an EU importer should connect the product, documents and supply chain:
- Confirm the destination market and exact standard edition.
- Write the complete category and optional markings into the specification and purchase order.
- Identify the exact model, size range, last, toe cap, puncture insert, upper, outsole compound and construction.
- Review the EU Type-Examination Certificate, its validity, Notified Body and listed models.
- Match the supporting test report to the approved production configuration.
- Review the EU Declaration of Conformity, instructions, language, CE marking and traceability information.
- Approve a sealed golden sample and a controlled bill of materials.
- Define change control: component, supplier, formula or construction changes require compliance review before production.
- Use pre-shipment inspection for identity, workmanship, quantity, packaging and marking; do not treat visual AQL inspection as a substitute for laboratory performance testing.
Under Article 12 of the PPE Regulation, an importer or distributor is considered a manufacturer when it places PPE on the market under its own name or trademark, or modifies PPE already placed on the market in a way that may affect compliance. The resulting obligations should be built into the actual private-label supply arrangement.
Litai Product Platforms for Category Planning
DS-006 safety shoes provide a useful Class I sourcing platform. The published construction includes a top-grain leather upper, mesh lining, EVA insole, PU/PU outsole, EU sizes 37–46, and OEM options for a steel toe cap and steel midsole. Litai does not present one specific EN ISO 20345 category for every DS-006 option on that page. The final marking must therefore follow the approved bill of materials, testing and certificate for the ordered configuration.
DR-1-18 PVC rain boots illustrate a Class II direction. The product page lists a PVC upper, PVC-nitrile sole, fabric lining, injection construction, UK 3–13 / EU 36–48 sizing, colour customisation, and optional steel toe and steel midsole. It also lists S4 or S5 options. Buyers should confirm which exact version, standard edition, components and current test documents apply to their order; the options should not be treated as simultaneous claims for every boot.
See more Litai safety footwear, compare steel and composite toe options, or review our AQL inspection guide for safety shoes.
Why Importers Work with Litai
Litai supports wholesalers, PPE distributors and private-label brands with factory-direct OEM/ODM development. The value is not merely adding a logo to an existing shoe. A professional sourcing project connects the target performance, construction, materials, last, size grading, branding, packaging, approved sample and quality-control plan.
Our team can discuss steel or composite toe solutions, metallic or non-metallic puncture-resistant components, outsole and upper options, custom colours and packaging. Production claims remain configuration-specific: Litai can develop around a buyer’s target category, while final marking and compliance claims depend on testing and certification of the approved production configuration. Explore our OEM safety-footwear customisation process and factory background.
Frequently Asked Questions
What is the current EN ISO 20345 edition?
For current European sourcing, use EN ISO 20345:2022 together with A1:2024 and verify the latest destination-market harmonised-standard list. The international base is ISO 20345:2021 with Amendment 1:2024.
What is the difference between S1P, S1PL and S1PS?
All start with S1. P identifies a metallic puncture-resistant insert, while PL and PS identify non-metallic routes using different test nails and criteria. The full marking and exact test report matter more than the material trade name.
Is S3 waterproof?
No. S3 includes upper WPA requirements, puncture resistance and a cleated outsole, but WPA is not whole-footwear WR. For Class I footwear with whole-footwear water resistance, assess S6 or the appropriate S7 variant.
Are S4 and S5 only for PVC or rubber boots?
They apply to Class II all-rubber or all-polymeric footwear, which commonly includes moulded PVC, PU and rubber safety boots. S5 variants add the stated puncture-resistance route and a cleated outsole to S4 properties.
Does a test report prove CE compliance?
Not by itself. EU compliance also requires the applicable conformity assessment, certificate, technical documentation, Declaration of Conformity, marking, instructions and production consistency. All documents must cover the same product configuration.
Can an OEM change the toe cap, midsole or outsole after testing?
A change may affect protective performance and certificate scope. It should be reviewed under formal change control, with the compliance owner and Notified Body determining whether document review, additional testing or new certification is required.
Turn the Category into a Purchase Specification
The core procurement lesson is simple: choose properties from the risk, not a category from a sales slogan. Then make the exact model, components, label, report, certificate and production sample agree. That approach protects end users, reduces customs and market-surveillance risk, and gives the factory a clear target for repeat orders.
Contact Litai for OEM rain boots and safety footwear solutions. Send us the application, destination market, target EN ISO 20345 safety categories, size ratio, quantity and branding requirements. Our team will help you build a configuration and document checklist for sampling and quotation.
