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The armor uses relatively the same thickness of steel as the U.S. army steel helmet or is 3.5mm thick, but is made of higher strength vanadium chrome steel, that is cold rolled and then hammer-forged which increases the strength of the steel, and then bent and curved in order to increase it's energy absorption. The armor is cryogenically treated to increase it's hardness and durability, along with other mechanical processes to increase the strength of the armor. Backing this is a thin layer of aluminum to serve as a backing, and behind this is fireproofed high strength fiberglass, which is mixed with a composite silicon carbide composite fibers to increase the strength and help break up the fragments of penetrating rounds. Behind this is a thin layer of ballistic nylon designed to help catch fragments and absorb the energy of bullets. Over the heart, spinal cord, helmet, and other key vital areas of the body, a layer of ceramic helps to stop rifle rounds, allowing the soldier to survive otherwise lethal wounds from major rifle rounds. However injury can still result over the body and if not treated can just as easily lead to death. The armor is designed to stop a .30 carbine round over the main areas covered in steel, and a rifle round over key vital areas. The rest of the body is covered in a thin layer of ballistic nylon and fiberglass which helps catch small fragments, but without a high end internal cooling suit the armor could not afford to be very thick.