Iso20345 tested: conforms to iso20345 safety footwear standard. s1: safety footwear leather upper plus antitstatic and energy absorbing heel. toe protection tested to 200 joules impact. dual density pu sole: dual density pu sole for brilliant slip resistance and excellent durability. antistatic: prevents a build up of static charge, offering good conductivity. padded ankle collar: for comfort and support. src slip resistance: tested on ceramic tile contamination with a dilute soap solution. tested on smooth steel contamination with glycerol.