S1 Anti-Static
S2 Extra waterproof
S3 Steel midsole and anti-slip tread
The S3 standard is the most common and highest safety standard for safety shoes. S4 and S5 refer to work boot.
The S3 standard consists of the following safety elements:
- Antistatic properties
- Upper material of high quality
- Protective nose (impact protection up to 200J)
- Energy-absorbing and shock-absorbing running sole
- Water-repellent and water absorbent upper material
- Penetration resistant midsole (nails etc)
- Water-repellent
- Lining and insole consist of breathable textiles
- Reflective details
- All requirements of safety class S3 are met