- Style Name Knightsbridge
- Style Number TC520
- Size UK 6-12 (Whole Sizes)
- Specification EN ISO 20345:2011 S3 ESD SRC + EN 61340-5-1:2007
If you see this symbol, then you know you’re looking at an ESD certified boot. This is the standard that certifies protection against the required level of Electro Static Discharge.