Big-time durability, wider widths, extended sizes. We built Big Rig from the ground up to give you the right foundation. A roomier opening gives you more space to slip them on and off, and the extra durable design is built to withstand harsh outdoor work environments like oil and gas exploration. Features: -ATS® technology provides ergonomic support on uneven terrain -U-Turn® Entry System lets people with high arches easily slip on their boots -VentTEK™ 360° cooling for all over temperature regulation -Removable Energy Max™ anti-fatigue insole for maximum comfort -FLX Foam™ midsole has a light springy feel that cushions each step -Oil- and slip-resistant Duratread™ sole provides maximum wear resistance -Flared sole design with debris-release tread -Goodyear welt construction -ASTM F2413 M/I/C EH rated -Ariat is including you in its dedication to environmental stewardship. By purchasing this product, you are supporting the responsible production of leather at Leather Working Group-certified tanneries.