- CARHARTT. CMX4023. 4 INCH LIGHTWEIGHT SOFT TOE WEDGE BOOT. DARK BISON OIL TANNED. Leather durability and sneaker comfort. These lightweight boots blend a stitched-leather upper and cushioned sneaker-like midsole. A sweat-wicking liner keeps your feet dry in a wide range of conditions, while the cushioned design keeps you light on your feet.