Within EN345 and EN20345 there are other features added to the safety footwear which are needed depending on the environment for which they are being used. Adding the following levels after the EN345 or EN20345 mark denotes such features. Examples are:
- SB - Safety Basic has all the features required to pass the standard
- SBP - As SB with pierce resistant midsole
- S1 - As SB with anti-static sole and cushioned heel area
- S1P - As S1 with pierce resistant midsole
- S2 - As S1 with water resistant upper
- S3 - As S2 with pierce resistant midsole