What is the difference between S1, S1P, S2, and S3 safety shoes?
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Difference Between S1, S1P, S2, and S3 Work Shoes: Which Do You Need?
When choosing work shoes, you'll quickly encounter the terms S1, S1P, S2, and S3. These letters and numbers refer to the safety classes according to the European standard EN ISO 20345 — and they determine the protection your work shoes offer. But what exactly do they mean, and which class do you need?
In this article, we'll clearly explain the differences, with a handy overview and specific advice for each profession and work environment.
What is EN ISO 20345?
EN ISO 20345 is the European standard that establishes the safety requirements for work shoes. Any work shoe that complies with this standard offers at least toe protection against an impact of 200 joules — which is comparable to a 20-kilogram object falling on your foot from a height of 1 meter.
Within this standard, different safety classes are distinguished. Each higher class offers additional protection on top of the basic requirements.
Overview: S1, S1P, S2, and S3 at a Glance
| Feature | S1 | S1P | S2 | S3 |
|---|---|---|---|---|
| Protective toe cap (200J) | ✅ | ✅ | ✅ | ✅ |
| Anti-static | ✅ | ✅ | ✅ | ✅ |
| Energy absorption heel | ✅ | ✅ | ✅ | ✅ |
| Closed heel | ✅ | ✅ | ✅ | ✅ |
| Puncture-resistant sole | ❌ | ✅ | ❌ | ✅ |
| Water-repellent upper leather | ❌ | ❌ | ✅ | ✅ |
| Profiled outsole | ❌ | ❌ | ❌ | ✅ |
S1 work shoes: basic protection for dry environments
S1 work shoes offer the basic protection you need in dry, indoor environments. They have a protective toe cap, are anti-static, and absorb energy in the heel. Because they don't have to meet water-resistant requirements, S1 work shoes are often lighter and more comfortable — ideal for those who are on their feet all day.
Suitable for: warehouse work, light industry, automotive workshops, logistics (indoor), assembly.
S1P work shoes: basic protection + puncture protection
S1P is the same as S1, but with a puncture-resistant midsole. This protects your foot from sharp objects (nails, screws, glass shards) that could penetrate the sole. The 'P' stands for 'penetration-resistant'.
Suitable for: construction (indoor work), installation, maintenance, workshops with sharp materials on the floor.
S2 work shoes: water-repellent without puncture protection
S2 work shoes add water-repellent upper leather to the S1 basic requirements. This means that the upper part of the shoe keeps water out for a certain period. However, they do not have a puncture-resistant sole.
S2 is less common in practice. Professionals usually opt directly for S3, which is both water-resistant and puncture-resistant.
Suitable for: work environments where water is present but no risk of sharp objects on the ground.
S3 work shoes: maximum protection for outdoor and construction
S3 is the most chosen safety class in the Netherlands. These work shoes combine all protective features: protective toe cap, anti-static, puncture-resistant sole, water-repellent upper leather, and a profiled outsole for grip on slippery or uneven surfaces.
Suitable for: construction, civil engineering, outdoor work, industry, agriculture, anything where wet and unpredictable conditions occur.
Which class do you need? Advice per profession
| Profession / Work Environment | Recommended Class | Why |
|---|---|---|
| Warehouse worker (indoor) | S1 | Dry environment, lightweight comfort important |
| Mechanic / installer | S1P | Risk of sharp objects on the ground |
| Logistics / distribution | S1 or S1P | Depends on indoor/outdoor work |
| Automotive technician | S1P | Workshop with oil, metal shavings, and screws |
| Construction (indoor) | S1P or S3 | Puncture protection essential; S3 for wetness |
| Construction (outdoor) | S3 | Water, mud, and sharp materials |
| Road construction / earthmoving | S3 | Maximum protection in all weather conditions |
| Garden and landscape work | S3 | Wet conditions and uneven terrain |
| Food industry | S2 | Waterproof important, no puncture risk |
New standard: EN ISO 20345:2022
Since 2022, there has been an updated version of the standard. The biggest change is the addition of subcategories with the letter 'S' appended, such as S1PS and S3S. The 'S' stands for extra slip resistance on contaminated surfaces (such as oil or soap on tiles).
Additionally, new optional features have been added, such as protection against contact with heat (HI) and cold insulation (CI). When buying work shoes, pay attention to which standard (2011 or 2022) is stated.
Frequently asked questions
What is the difference between S1 and S3 work shoes?
S1 work shoes offer basic protection for dry environments. S3 work shoes offer the same basic protection plus water-repellent material, a puncture-resistant sole, and a profiled outsole. Choose S1 for indoor and S3 for outdoor or wet work conditions.
Which safety class of work shoes do I need?
This depends on your work environment. For dry workplaces, S1 is sufficient. For environments with sharp objects on the ground, S1P is recommended. For construction, outdoor or wet environments, choose S3.
What does EN ISO 20345 mean?
EN ISO 20345 is the European standard for safety footwear. All work shoes with this certification offer at least protection against impact (200 joules) on the toe. The standard defines the various safety classes (S1 to S5), each with its own additional protective features.
Are S3 work shoes heavier than S1?
Traditionally yes, but modern work shoes such as those from Sparco have significantly reduced this difference. Thanks to innovative materials and composite protection, many S3 work shoes are now almost as light as S1 models.
Looking for Sparco work shoes?
View the complete range of work shoes at BRENDS — from lightweight S1 sneakers to robust S3 safety shoes.