Coding explained

The safety features of footwear, including slip resistance, are tested according to a set of European test standards written into EN ISO 20344:2004 (A1: 2007). Footwear which has passed the EN test for slip resistance will be marked with one of the following codes, SRA, SRB or SRC.

The codes indicate that the footwear has met the specified requirements when tested as follows:

• SRA – tested on ceramic tile wetted with dilute soap solution;
• SRB – tested on smooth steel with glycerol;
• SRC – tested under both the above conditions.

It should be noted that these test surfaces are not wholly representative of all underfoot surfaces, so additional information may be needed to help to identify the best slip-resistant shoes for your particular environment.

Source: http://www.hse.gov.uk/slips/footprocure.htm