Upper Material: Nubuk leather, 1.6 – 1.8 mm Inner Lining: GORE-TEX® Extended- 3-layer GORE-TEX® laminate, waterproof and highly breathable. Abrasion-resistant lining with optimized climate comfort, especially for flexible alternating inside and outside use. Insole: Comfortable, cushioning, moisture repellent, anti-bacterial. Separate heel shape for good cushioning and foot insertion. “AIRFLOW” channels. Durable Sole: Rubber mixture for long durability. Running sole: Made of rubber