These Carhartt Greenfields 2 work boots offer Rugged Flex™ technology for ease of movement. They feature a hydro-treated nubuck leather upper with a mesh lining and a lace-up closure with coated iron eyelets. The boots are designed with an energy-absorbing, removable insole with anti-odor and absorption properties, a polyurethane-injected midsole, and a rubber outsole that is oil-resistant (SR), heat-resistant to 300°C (HRO), fuel-oil resistant (FO), and heat-insulated for 30 minutes at 150°C (HI). A lightweight stability shank minimizes fatigue. These boots meet EN ISO 20347: 2022 (02) standards. Care instructions: Do not tumble dry, dry-clean, wash, iron, or bleach.