This unique U.S. Navy and U.S Marine Corps flight approved hot weather boot is best in its class when it comes to cool comfort and protection. In addition to the ASTM certified/EH rated steel toe and anti-microbial lining that are used, the 340 DES ST is also made with a Nomex blended flame resistant fabric engineered to stand up to excessive temperatures to better protect your feet.BOOT FEATURESHEIGHT: 8"(Standard Military Height)UPPER: 100% cattlehide leather & blended NOMEX flame-resistant fabricMIDSOLE: Highly cushioned, shock absorbent midsoleOUTSOLE: 100% rubber VIBRAM SierraINSOLE: Single density molded removable insertSPECIAL FEATURESVANGUARD running shoe sole constructionSteel toe meets ASTM F2412-11 and F2413-11 standards for impact & compression and EH ratedAnti-microbial, odor-reducing liningAR 670-1 Compliant