Extremely durable, cushioned, and heat-resistant, the Sierra collection keeps feet comfortable and supportive in tough conditions. It's ideal for harsh outdoor jobs, high heat environments or intense construction work. Sierra Waterproof Work Boot Product Features : ATS® technology provides ergonomic support on uneven terrain, DRYShield™ waterproof breathable construction, Removable All Day Cushioning insole, Oil- and slip-resisting Duratread™ sole for maximum wear resistance, passes hot contact test at 300°C572°F, 90° heel, Resolable Goodyear welt construction for durability, ASTM F2892 EH rated Men's Sierra Waterproof Work Boots in Sunshine, Size: 7 D Medium by Ariat