Extreme winter weather is no match for our new Pac Max work boots with an impressive list of performance, comfort, and safety features that are essential for working in frigid work environments. For starters, these 10" tall boots are constructed with metal- and mutilation-free, highly abrasion-resistant, and waterproof Ever-Guard™ leather uppers. To help keep out warmth-robbing moisture, we added breathable, internal waterproof membranes for maximum waterproof protection and resistance to blood-borne pathogens and EVA frost plugs that help remove perspiration. For extreme warmth, these boots include a heavyweight liner with insulation rated to -60°C (-76°F). Even their lightweight composite safety toes are slower to conduct cold than metal toe boxes. Additional safety features include electrical hazard protection, puncture-resistant plates, and 3M™ retroreflective tape on toes and heels for 360-degree visibility. Your comfort is ensured with our shock-absorbing Anti-Fatigue Technology footbeds and cushioned polyurethane midsoles. For sure footing, their heat-, oil-, slip-, and abrasion-resistant, non-marking All-Weather TPU outsoles offer superior traction in tough conditions and are compatible with crampons for even more grip on frozen terrain.