Products Description Nubuck leather is full grain leather with a buffed surface, which gives the leather a particularly soft and velvety feel. 3D mesh is a light-weight, 3D woven fabric and is highly breathable. The GORE-TEX membrane is the heart of GORE-TEX footwear. It is completely waterproof but permeable for water vapor. The result: water from the outside will never penetrate and perspiration can escape easily. Thermoplastic polyurethane (TPU) is mixed with glass fibers to create an impact-resistant material with a high degree of stiffness. MBT provides seven different rubber outsole profiles, each adapted to the usage of the footwear. The rubber outsoles are made out of 20 different compounds and provide a perfect balance between grip and durability.