Upper: Hight quality full grain leather for flexibility. Built with interior nylon with a tensile strenght of woof 800N/50mm and warp 600N/50 mm. Reinforced toe box for durability. Insole: Reinforced suede toe box. Base: EVA anatomically shaped. Midsole: High quality and durable Phylon. Outsole: Top class rubber with DIN-70 abrasion.