ISO standards for occupational footwear
There are two ISO standards for occupational and safety footwear, EN ISO 20344 and EN ISO 20345. The 20344 standard describes the means by which footwear must be tested. These are therefore the test procedures for safety, protective and occupational footwear. The definition of the basic requirements and additional requirements for safety footwear is standardised in 20345.

Safety shoes SB
Meets the basic requirements (shoes with standardised toe caps).
Area of application: indoor areas such as warehouses and kitchens
Safety shoes S1
Meets basic requirements (shoes with standardised toe caps), antistatic (A), energy absorption in the heel area (E), fuel resistant sole (FO)
Area of application: indoor areas such as warehouses and kitchens
Safety shoes SP1
Meets the basic requirements (shoes with standardised toe caps), antistatic (A), energy absorption in the heel area (E), fuel resistance sole (FO), penetration resistance (P).
Application area: Indoor areas where there is a risk of injury from sharp objects.
Safety shoes S3
Meets the basic requirements (shoes with standardised toe caps), antistatic (A), energy absorption in the heel area (E), fuel resistance sole (FO), resistance of the upper part of the shoe to water penetration and water absorption (WRO), penetration resistance (P), profiled outsole.
Area of application: Outdoor areas where there is a risk of injury from sharp objects. Safety areas
Safety shoes S5
Meets basic requirements (shoes with standardised toe caps), antistatic (A), energy absorption in the heel area (E), fuel resistance sole (FO), resistance of the upper part of the shoe to water penetration and water absorption (WRO), waterproof solid rubber shoe or boot, penetration resistance (P).
Field of application: outdoor areas in rain and wet conditions, mud and slush, where there is a risk of injury from sharp objects. Fortswirtschaft
Safety shoes SRC
Slip resistance ceramic tile & detergent (SRA), slip resistance steel bottom & glycerine (SRB)