Common symbols denoting protective footwear standards

P: Steel intermediate sole (permeability resistance up to 1100 kg)

C: Electrical resistance up to 100 Kiloohms (conductive footwear)

HI: Insulation against heat

A: Antistatic footwear (Electrical resistance 0.1 to 1000 Megaohms)

CI: Insulation against cold

HRO: Heat resistant sole (up to 300ºC)

WRU: Water resistance upper surface of the footwear

E: Energy absorption of the heel area

ESD: Electrostatic discharge

EN ISO 20345 Safety Footwear (200 Joule – Steel Impact Resistance)

EN ISO 20345: Steel or composite work footwear with toe protection must have resistance against 20 Joule impact and 15,000 Newton pressure.

SB: Basic Safety

S1: Antistatic, shock absorbing heel area, oil resistant sole

S1 P: Antistatic, shock absorbing heel area, oil resistant sole, steel intermediate sole

S2: Antistatic, shock absorbing heel area, oil resistant sole, water resistant

S3: Antistatic, shock absorbing heel area, oil resistant sole, water resistant, steel intermediate sole

EN ISO 20347 Occupational Footwear (No Resistance Against Toe Impact)

EN ISO 20347: Occupational footwear with no resistance for toe impact must comply with one or more of the P,C,A,E,CI, or HI categories.

01: Antistatic, shock absorbing heel area

01 P: Antistatic, shock absorbing heel area, steel intermediate sole

02: Antistatic, shock absorbing heel area, water resistant

03: Antistatic, shock absorbing heel area, water resistant, steel intermediate sole