Combat Boot,Mickey Mouse Extreme Cold Weather Boots, Waterproof Rubber, Genuine U.S. Military Issue Rubber Genuine U.S. Military (Army) Issue, not commercial knockoff (Rothco) or foreign-made imports Waterproof Rubber w/ Fused Gusset Tongue, Vulcanized Rubber Outsole, Vapor Barrier Insulation w/Valve High Blucher, Seamless Shell, Direct Molded Sole, Nylon-Coated Lace Eyelets, Comfortable Use to -20 Deg F! Made by various contractors (Bata, Miner) for U.S. Government. Not foreign-made or imported, US Made! FEATURES AN AIR PRESSURE RELEASE VALVE, TO BE OPENED DURING HIGH-ALTITUDE FLIGHT OR CLIMBING TO ALLOW AIR PRESSURE RELEASE