We designed our heavy-duty insulated Boondock manufacturing boots to provide industrial-grade protection from every angle. Starting with their premium Timberland waterproof leather uppers with internal waterproof, breathable membranes for maximum waterproof protection and resistance to blood-borne pathogens, we added 400 grams of insulation for cold-weather comfort and to retain heat, our molded Timberland PRO rubber toe protectors that are as thick as standard boot outsoles and backed with composite safety toes, rigid external heel cups to support lateral movement, and our Anti-Fatigue Technology footbeds for all-day shock absorption and energy return. You'll also find protection from below with our heat-, slip-, oil, and abrasion-resistant, non-marking, lightweight, All-Weather TPU outsoles that offer enhanced traction in extreme environments. Plus, their breathable, moisture-wicking linings are made of ReBOTL fabric containing at least 50% recycled plastic with a treatment for odor control.