Strong, water-repellent ECCO Hydromax full-grain leather or oiled nubuck with waxed stitching. Waterproof Gore-Tex. membrane that keeps your feet dry and at the same time allows them to breathe. Vegetable tanned and metal-free leather insole with ECCO Comfort Fibre System foam recycled material or insole with textile/felt with perforated EVA which ensures good air circulation. Both types are interchangeable. Anatomically shaped, extra soft and flexible Freon-free polyurethane PU midsole with shock absorption shock point). Hardwearing, light and flexible Freon-free polyurethane PU outsole.