EUROPEAN SAFETY SHOE STANDARD, EN 20345
S1
Shoes that are worn in dry conditions.
Requirements: closed heel, steel toecap, antistatic and energy absorbing heel.
S2
Shoes that are worn in wet conditions.
Requirements: as for S1, but waterproof for at least 60 minutes.
S3
Shoes that are worn in places where there is a risk of treading on sharp objects.
Requirements: as for S2, but with steel midsole or alternative.