Upper Material: 2.0 – 2.2 mm thick Waterproof, Hydrophobic and Breathable Leather (5.0 mg/cm2/h) Inner lining: GORE-TEX® Performance- 4-layer GORE-TEX® laminate, waterproof and breathable. Highly abrasion-resistant lining with fleece midlayer. Optimized- climate comfort for all year seasons and excessive use. Insole: Dimensionally stable, torsion-proof, avoids punctual preasure (e.g. of stones). Insert: Comfortable, cushioning, moisture repellent, anti-bacterial. Separate heel shape for good cushioning and foot insertion. “AIRFLOW” channels. Sole: Rubber/PU walking sole with proven street/terrain tread, wear resistant and non-slip traction