Cosmas Mens Vulcan Black Leather Boots 16 Eee Leather/Kermel Soft, full-grain leather collar ensures comfortable calves. Accordion-style flex points behind and in front of the ankle allow the boot to flex where you do, providing improved range of motion. Fire-resistant Kevlar thread throughout the upper ensures durability under fire. Anti-microbial removable footbed with molded EVA heelcup and arch conforms to your foot providing comfort and support.