S3 vs S7 Safety Shoes: What's the Difference in EN ISO 20345:2022?

If you’re sourcing or distributing safety footwear in Europe, you’ve likely noticed the new classifications under EN ISO 20345:2022. One of the most important updates is the introduction of S7 safety shoes. But how does S7 compare to the long-established S3 safety boots? Let’s break down the differences.

What Does S3 Mean in Safety Footwear?

S3 safety shoes have been the industry standard for years. They include:

• Toe cap protection (200 Joules)

• 08/26/2025Antistatic properties

• Energy absorption in the heel

• Fuel and oil resistant outsole

• Penetration-resistant midsole

• Cleated outsole for grip

• Water-resistant upper (WRU)

👉 S3 boots are versatile, widely used in construction, logistics, and manufacturing, but water protection is limited to the upper material only.

What Does S7 Mean in Safety Footwear?

S7 safety shoes, introduced in EN ISO 20345:2022, build on S3 but add full waterproofing:

• Includes all S3 features

• Plus WR (water resistance of the whole shoe), not just the upper

👉 This makes S7 safety boots ideal for wet environments like construction sites, agriculture, oil & gas, and outdoor utilities.

S3 vs S7: The Key Difference

The difference is simple:

• S3 = water penetration resistance (upper only)

• S7 = full waterproof protection (whole footwear)

Why S7 Matters for Distributors and Buyers

• Growing Demand: European buyers increasingly ask for S7 waterproof safety shoes.

• Better Protection: Ideal for workers exposed to rain, mud, and standing water.

• Competitive Edge: Position your brand as forward-looking with EN ISO 20345:2022-compliant safety boots.

Marketing Insight: How to Sell S7 Shoes

When explaining to customers:

• S3 = reliable protection for everyday work

• S7 = advanced waterproof safety boots for tough, wet environments

👉 Selling tip: “S3 keeps workers safe. S7 keeps them safe and dry.”

✅ Conclusion:
The difference between S3 and S7 safety footwear lies in water protection. Both meet high safety standards, but S7 safety shoes offer full waterproofing, making them the smarter choice for industries facing wet and outdoor conditions. For distributors, adding S7 safety boots to your range ensures you stay ahead in the European market.