PU Laminated Cow leather 
Technical Adjustment buckles. 
Waterproof & Breathable membrane.  
Foot Bed made of EVA and nitrile special compound, with high bearing capacity and variable thickness Thermoformed, anatomic, punched and coated with highly breathable fabric.
Anti-slip Oil and Petrol Resistant Rubber Sole
Non-Metallic zero perforation mid Sole
MEETS EN 13634:2015.