Safety and occupational footwear must meet the requirements of European Council directives on personal protective equipment. The following S/O protection classes are marked on the products when they have been manufactured in accordance with these directives and the European standards EN 345/ EN 20345 and EN 347/ EN 20347.

S1/O1
- antistatic
- energy absorption of seat region
- closed heel
- oil resistant outer sole
- mainly for indoor and summer use

S2/O2
- antistatic
- energy absorption of seat region
- closed heel
- oil resistant outer sole
- water penetration (Og/60 min.) and water absorption on the inside (30%/60 min.)
- outdoor use

S3/O3
- antistatic
- energy absorption of seat region
- closed heel
- oil resistant outer sole
- water penetration (Og/60 min.) and water absorption on the inside (30%/60 min.)
- cleated outer sole
- protection from nail penetration
- mainly for construction industry

S4/O4
- antistatic
- energy absorption of seat region
- closed heel
- oil resistant outer sole
- material rubber/PU
- outdoor use

S5/O5
- antistatic
- energy absorption of seat region
- closed heel
- oil resistant outer sole
- material rubber/PU
- patterned outer sole
- protection from nail penetration
- outdoor use

Extra features;
HRO- heat resistant sole, heat tolerance (+300C)
ORO- oil resistant, included in S classification
WR- water resistant
CI-insulation from cold