A medical bandaging product having a predetermined length suitable for a given medical use, including an enclosure formed of a moisture-impervious material sealable to prevent entry of moisture and a medical bandage material positioned in the enclosure and sealed therein against entry of moisture until use. The medical bandage material includes a substrate formed from a single integrated knitted fabric layer having a plurality of interconnected knitted fabric yarns forming a three-dimensional structure. A reactive system is impregnated into or coated onto the substrate. The system remains stable when maintained in substantially moisture-free conditions and hardens upon exposure to sufficient moisture to cooperate with the three-dimensional structure to form a rigid, self supporting structure. A soft, flexible protective wrapping encloses the substrate along its length for providing a cushioning barrier interposed between the substrate and a patient when the medical bandage material is in use.