S1, S2, S3 and S7 Safety Shoes: Complete Guide to EN ISO 20345 Protection Classes

Choosing the right safety shoes can be confusing. S1, S2, S3 and S7 are not simply product names — they represent different levels of protection defined by EN ISO 20345 safety footwear standards.

S1 (Basic protection, dry environments)
Features: Impact-resistant toe cap, antistatic properties, heel energy absorption, and a closed-heel design.

Suitable for: Warehouses, indoor factory areas, and other dry environments.

S2 (Enhanced water resistance, mildly damp conditions)
Adds to S1: Water-resistant upper (WPA).
Suitable for: Mildly damp areas, cleaning operations, or semi-outdoor environments.

S3 (Reinforced for outdoor use)
Adds to S2: Puncture-resistant midsole + cleated slip-resistant outsole (deeper tread).
Suitable for: Construction sites, logistics, and complex outdoor terrain.

S7 : The Highest Protection Level for Wet and Harsh Environments
Further enhancements over S3: Higher-level water resistance (WR rating), superior durability, and all-weather adaptability.
Suitable for: Mining, heavy industry, and environments involving prolonged wetness or harsh conditions.

FAQ

Q1:

What is the difference between S3 and S7 safety shoes?

S7 provides the same protection as S3 but adds waterproof protection (WR).

Q2:

Are S7 safety boots completely waterproof?

S7 safety footwear is designed with WR waterproof protection according to EN ISO 20345:2022.

Q3:

Which safety shoe rating is best for construction workers?

S3 or S7 depending on whether waterproof protection is required.

Recommended AEGISEC Safety Footwear Solutions：

For Indoor Workplaces

→ S1 Safety Shoes

For Construction & Outdoor Work

→ S3 Safety Boots

For Wet & Extreme Environments

→ S7 Waterproof Safety Boots

Looking for S1, S2, S3 or S7 safety footwear for your market? AEGISEC provides OEM and ODM safety shoe solutions for distributors, wholesalers and industrial buyers worldwide.

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