If you’ve ever gone shopping for protective footwear, you’ve probably been overwhelmed by the different types of safety shoes available on the market, especially in our days. Those short codes like S1, S2, and S3 aren’t random – they tell you exactly how the footwear is built and what hazards it can handle in order for you to have a clear idea on what environments it can be used. Choosing the wrong type can mean discomfort, reduced safety, or even serious injury for the person using them.
The ISO Standard That Defines Safety Footwear
Most types of safety shoes follow the EN ISO 20345 standard, which lays down the minimum requirements for protective footwear. In Europe, this isn’t just a guideline – it’s the law, and it must be followed by all manufacturers from EU and by the external ones who wants to sell such PPE in EU.
Key Requirements in ISO 20345
- Impact resistance: Toe caps must withstand 200 Joules – like a hammer falling from height.
- Compression resistance: Withstand 15 kN, similar to a small car wheel pressing down.
- Slip resistance: Tested on surfaces that match real work environments.
- Clear labelling: Footwear must be marked with its safety category.
Breaking Down the Main S Categories For The Types of Safety Shoes
The categories are designed for different environments and hazards. Here’s a breakdown of each one of them:
S1 – Dry, Indoor Work
Closed heel, antistatic, energy-absorbing heel, fuel oil resistance. Perfect for warehouses, logistics, and factory floors. Light jobs mainly.
S1P – Puncture Protection Indoors
All S1 features plus a midsole that resists nails, glass, or sharp metal.
S2 – Occasional Wet Work
Adds water resistance to the upper – useful for kitchens, hospitals, and cleaning services.
S3 – Outdoor and Heavy-Duty
Water-resistant upper, puncture protection, and cleated outsole for grip on rough terrain.
S4 – Fully Waterproof Boots
Made from polymer or rubber, antistatic, and energy-absorbing. Best for constant wet environments.
S5 – Maximum Outdoor Protection
All S4 benefits plus puncture resistance and a cleated sole – ideal for muddy construction sites or agricultural work.
Compliance Across Global Markets
Different countries have different rules for the types of safety shoes they allow.
European Union – CE Marking
All footwear must be tested under EN ISO 20345 before it can carry the CE mark.
United States – ASTM Standards
Standards ASTM F2412 and ASTM F2413 replace the old ANSI Z41. Ratings include I/75 (impact), C/75 (compression), EH (electrical hazard), and PR (puncture resistance).
Canada – CSA Z195
Similar to ASTM but adapted for extreme cold.
Australia/New Zealand – AS/NZS 2210.3
Close to ISO 20345 but with adjustments for regional hazards.
Middle East
Often uses EN ISO 20345 as the base, sometimes adding chemical resistance requirements.
How to Choose the Right Safety Footwear
When picking between different types of safety shoes, think about:
- The hazards in your workplace (water, sharp objects, heat, chemicals).
- The legal standards in your country.
- Comfort and fit for long working hours.
When a company is choosing the type of safety shoes, as good practice should be to test various models, and based on the feedback to choose the best one of them.
Legal Requirements for Providing PPE to Employees
Employers have a legal obligation to provide personal protective equipment (PPE), including safety shoes, free of charge to their employees. This requirement stems from occupational safety and health laws in many countries, such as the European Framework Directive 89/391/EEC in the EU or OSHA regulations in the US.
The key points are:
- PPE must be provided at no cost to the worker.
- The type of safety footwear must be appropriate for the specific risks present during each task.
- This is determined by a risk assessment that identifies hazards and selects suitable protection.
- Employers must ensure PPE is properly maintained, replaced when worn out, and used correctly by employees.
This legal framework protects workers and helps companies avoid penalties, accidents, and downtime.
Understanding the types of safety shoes isn’t just for safety managers – it’s essential for anyone who works in a hazardous environment. From S1 to S5, each category offers specific protection, and knowing the difference ensures you’re protected, comfortable, and compliant with the law.
If you want to have a better understanding about the role of Personal Protective Equipment here it is a much more in details article, about the PPE in general.