Fear no impact, feel no fatigue. Sierra Shock Shield® helps you stay comfortable longer absorbing impact to your feet. Extremely durable, cushioned, and heat-resistant, it's ideal for harsh outdoor jobs, high heat environments, and intense construction work. Sierra Shock Shield Waterproof Steel Toe Work Boot Product Features : 0 : ATS® technology provides ergonomic support on uneven terrain, 1 : DRYShield™ waterproof breathable construction, 2 : Shock Shield® technology diffuses heel impact while absorbing shock and helping minimize fatigue, 3 : Removable Energy Max™ anti-fatigue insole for maximum comfort, 4 : Oil- and slip-resisting Duratread™ sole for maximum wear resistance, passes hot contact test at 300°C572°F, 5 : 90° heel, 6 : Resolable Goodyear welt construction for durability, 7 : Four-row stitch pattern with embroidery, 8 : ASTM F2413 MIC EH rated Men's Sierra Shock Shield Waterproof Steel Toe Work Boots in Distressed Brown, Size: 7 D Medium by Ariat