The safety shoe that has no boundaries. Break new ground in the Frontier, the executive safety shoe that literally has no boundaries. It's made with the same care and attention to detail associated with high end luxury shoes. Brazilian 2 tone full grain leather combined with nubuck adds to the stylish look. If you' are looking for a shoe that fitsevery occasion, it's time to cross over to the Frontier. Upper: Full grain leather and nubuck. Outsole: TPU. Midsole: PU comfort pads. Footbed: Hydro-Tec® Comfort insole with leather toplayer. Fit: Wide. Sizes: 39-48.