These US Army combat Boots have been designed to protect your feet from cold injury in areas where cold are critical factors and where the mean monthly temperature ranges between 14 F and 68 F (-10 C and -20 C). The boot keeps the foot warm because it contains a part that consists of layers of wool and felt that are sealed between the rubber inner and outer layers of the boot so that no water can get into the insulation areas. These combat boots are absolutely great for hunting, hiking, snowmobiling, ice fishing, or when even you want to keep your feet warm, dry, & avoid frostbite in the coldest, wet conditions of winter. FEATURES Made of rugged rubber Rated to -40 degrees Fahrenheit Great for extreme cold weather situations rubber outside keeps you dry and warm sealed Sandwiched Insulated Rubber w/ Vapor Lock Nylon-Coated Lace Eyelets, Comfortable Use to -20 Deg F Rubber w/ Fused Gusset Tongue Side valve allows for inflation or deflation depending upon requirements High Blucher, Seamless Shell, Direct Sole Genuine U.S. Military (Army) Issue, not a commercial knockoff or foreign-made imports Vulcanized Rubber Outsole Designed as lightweight Made in the United States of America Cool, breathable rubber minimizes heat buildup for any environment.