Tough jobs. Even tougher conditions. But you're not backing down and neither are your boots. Because Grindstone Insulated Composite Boots are built from the ground up for hard-wearing performance and all-day comfort. The rugged full grain leather upper is reinforced front and back with hard-wearing Tec-Tuff to take all the abuse you kick up on the job. 100% waterproof/breathable to keep your feet dry in any weather. Now with 200-gram Thinsulate insulation for winter warmth. Dri-Lex lining fights boot stench. All on top of an oil-resisting sole with mud-shedding tread design. Composite toe meets ASTM F2413-11 M I/75 C/75 standards for impact and compression.