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 Steel Toe Work Boot Men's Sierra Shock Shield Wide Square Toe Steel Work Boots in Brown Bomber Full-Grain Leather, Size: 7 D Medium by Ariat