Extreme boots for extreme field conditions. These boots keep feet warm and dry even in the most unpredictable climates. • Breathable Airmesh™ lining • CR flex-foam bootie (5mm) with four-way stretch nylon, snag resistant cover is 100% waterproof, lightweight, flexible, buoyant and will form to virtually any calf girth. • Additional achilles overlay for added protection • 10mm Kick rim and spur catch for hands-free removal • Instep protector (rubber underlay) for added protection • Stretch-fit topline binding snugs calf to keep warmth in and cold out • Seamless "quick-clean" footbase overlay • Added toe protection with a wrap-up toe bumper • Molded, durable, rubber outsole provides maximum protection and stability • Comfort range of 70°F to -20°F