The colville delivers it all, bringing you a waterproof exterior teamed up with 400g Thinsulate inside. this boot is fortified with a Vibram alpha plus outsole that's ideal for industrial applications and high-heat environments like steel fabrication and welding. its shank bars and defined heel provide a sure-footed feel on ladders, while the wide base offers great stability and extra grip on dry and wet surfaces. this boot meets ASTM f2892 safety footwear standards.