Polyurethane boots that contains millions of tiny air bubbles making the boots lightweight and giving excellent thermal insulation.UPPER: Anatomic Polyurethane upperOUTSOLE: Easy cleaning Polyurethane outsole dust-proofLINING: Anti-bacterial sockFOOTBED: Removable insole made with an antistatic foam with extra grip printing. Good sweat managing for extra comfortSPECIAL: Insulation -50C -58FSAFETY: Steel toecap and midsoleCERTIFICATION: EN ISO 20345:2011 S5 CI SRCSelf Cleaning OutsoleSlip Resistance SRC