Dual density Nitrile Rubber/PU sole construction | Removable extra thick PU insock | Fuel and Oil resistant, Non-marking sole | SRC slip resistant and anti-static sole | Flex zone technology | 200J impact resistant composite toe cap and TPU toe cover | YKK Zip sided | Out sole heat resist to 300 degrees Celsius | 3M Thinsulate 400g thermal insulation | Meets AS 2210.3:2019 Cold Insulation, certified by BSI BMP 622279