Muck Boot Arctic Sport Mid Rubber Boots from Germany

Muck Boot Arctic Sport Mid Rubber Boots are insulated waterproof rubber mid-calf boots for cold wet environments, constructed with seamless rubber uppers covering over 90% externally, absent foxing or mechanical assembly. They are solely of rubber and not assembled by stitching or similar processes, but they are mid-calf, not knee-high, so they do not meet the riding boot definition under tariff item 6401.99.11.