Fear no impact, feel no fatigue. Sierra Shock Shield® absorbs impact to reduce foot fatigue and keep you comfortable longer. Extremely durable, cushioned, and heat-resistant, it's ideal for harsh outdoor jobs, high heat environments, and intense construction work. Sierra Shock Shield Work Boot Product Features : ATS® technology provides lightweight support that helps your foot adapt to uneven surfaces for lasting comfort and stability, Shock Shield® technology diffuses heel impact while absorbing shock and helping minimize fatigue, Energy Max™ anti-fatigue insole helps provide maximum comfort and support that can be easily removed for cleaning or replacement, Oil- and slip-resisting Duratread™ sole combines durability with flexibility, engineered for long-lasting performance, High heat-resistant sole, Goodyear welt construction joins the sole to the upper, providing long-lasting durability and extending the life of your boots, Four-row stitch pattern with embroidery, ASTM F2892 EH rated Men's Sierra Shock Shield Work Boots in Dark Brown Premium Full-Grain Leather, Size: 7.5 D Medium by Ariat