Protected Area Type of Protection Code
Steel Toe Basic Impact 200 joules including compression 15,000 newtons SB
200 joule toecap protection. Closed seat region (fully enclosed heel). Antistatic properties. Energy absorption of seat region. S1
200 joule toecap protection. Closed seat region (fully enclosed heel). Antistatic properties. Energy absorption of seat region. Water penetration and water absorption resistance. S2
200 joule toecap protection. Closed seat region (fully enclosed heel). Antistatic properties. Energy absorption of seat region. Water penetration and water absorption resistance. Sole penetration resistance. Cleated outsole. S3
Additional protections Outsole resistance to hot contact: up to 300 °C HRO
Penetration resistance offered by a steel midsole: 1100 newtons P
Heel energy absorption: 20 joules E
Water penetration-resistant uppers WRU
Electrical resistance Conductive: Maximum resistance 100 kΩ O
Antistatic: Range of 100 kΩ to 1000 MΩ A
Hostile environments Insulation against cold CI
Insulation against heat HI

There is also EN ISO 20346:2004 [6] for protective footwear (must comply to basic safety requirements but toe cap impact resistance requirement is lower – 100 Joules) & EN ISO 20347:2004 [7] for Occupational Footwear (must comply to basic safety requirements with anti static or slip resistant properties. This standard does not require a protective toe cap)