The disclosed vehicle armor includes a first layer forming an interior bottom surface of the cabin and comprised of a high-strength metal material, a second layer forming an exterior bottom surface of the cabin and comprised of a high-strength metal material, and, a middle layer sandwiched between the first and second layers and comprised of a polymer material. The underbelly device is configured having a plurality of high areas and low areas creating deflection faces and separation distances between an interior of the cabin and an exterior threat. A second, multi-layer composite structure, forming an interior floor of the cabin, may be incorporated as a fragmentation penetration barrier.