Different Safety Codes for Safety boots 

Safety Code Protection Level Key Features Additional Symbols (Optional) 
SB Basic Safety Toe cap (200J impact), antistatic (ESD), slip-resistant sole. None (minimal compliance). 
S1 Standard Safety SB + Closed heel, antistatic (ESD), energy absorption. A (Antistatic), E (Heel absorption), FO (Oil-resistant). 
S1P S1 + Puncture Resistance S1 + Steel/composite midsole (≥1100N penetration). P (Puncture-proof), A, E, FO
S2 Water-Resistant S1 + Water-resistant upper (partial protection). WR (Water-resistant), A, E, P (if added). 
S3 Heavy-Duty Safety S2 + Puncture-resistant sole + Cleated outsole. P, SR (Slip-resistant), WRU (Water-resistant upper). 
S4 Waterproof (Polymer Boot) S3 protection but made of rubber/waterproof material (e.g., Wellington boots). WRU, M (Metatarsal guard if added). 
S5 S4 + Puncture Resistance S4 + Puncture-resistant sole. P, HRO (Heat-resistant outsole), CI (Cold insulation). 

Additional Symbols Breakdown (Can Appear with S1-S5) 

Symbol Protection Example Use Case 
P Puncture-resistant (≥1100N) Construction, metalwork. 
A Antistatic (ESD) Electronics, flammable environments. 
E Energy-absorbing heel Reduces fatigue for long shifts. 
CI Cold insulation (-20°C) Freezers, cold storage. 
HI Heat insulation (300°C) Welding, foundries. 
M Metatarsal guard Heavy industrial (steel beams). 
CR Chainsaw resistance Forestry work. 

Key Takeaways
S3 is the most common for construction (water + puncture + grip).
S1P is lighter but still puncture-resistant (warehouse/light industrial).
S4/S5 are fully waterproof (agriculture, chemical handling).

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