| Category | EN ISO 20345 requirements |
| SB | Basic requirements
|
| S1 | Basic requirements +
|
| S1P | S1 +
|
| S2 | S1 +
|
| S3 | S2 +
|
| S4 | S1 +
|
| S5 | S4 +
|
Footwear that has passed tests for slip resistance will also have one of the following codes:
Tested on ceramic tile wetted with sodium lauryl sulphate (a diluted soap solution)
Tested on steel with glycerol
Tested under SRA and SRB conditions