Polyurethane boots, that contains millions of tiny air bubbles, making the boots lightweight and giving excellent thermal insulation.UPPER: Anatomic Polyurethane upper OUTSOLE: Easy cleaning Polyurethane outsole, dust-proof LINING: Anti-bacterial sock FOOTBED: Removable insole made with an antistatic foam with extra grip printing. Good sweat managing for extra comfort. SPECIAL: Insulation -20°C -4°F CERTIFICATION: EN ISO 20347:2012 04 SRC CI Material Composition Other Materials/Textile/Other Materials Upper Outer Material PU Lining Material PA SoleMaterial PU Heel Height 10 Heel Type N/A Colour: Green Upper Outer Material: PU Lining Material: PA SoleMaterial: PU Heel Height: 10 Fitting: Regular Calf Width: Standard Fastening: Slip On Fastening 2: Slip On