1.6-1.8mm Top Grain cow leather. 
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.
2 inches High quality Translucent PVC Sole
Non-Metallic zero perforation mid Sole
EN 13634:2015.