S1P Trekker Boot 36/3 FW63. S1P Trekker boot in a workwear friendly color combination of black/grey with breathable inner lining and closed eyelets. Protective steel toecap. Puncture resistant steel midsole. Direct injected dual density construction. Lightweight PU cushioned midsole. Slip. fuel and oil resistant PU outsole. Removable EVA cushion footbed. 3D breathable mesh lining.