Abstract: A splint product is used for forming a hard structure about a body portion. The product includes a substrate impregnated with a resin that hardens when exposed to water. A protective water-impervious envelope surrounds the substrate and shields the substrate from exposure to moisture in the atmosphere. An outer cushioning wrap surrounds the protective envelope and is for engaging the body portion. Prior to wetting of the splint product, the protective envelope is removed from its shielding position about the substrate so that the substrate remains inside the outer wrap. The outer wrap with the substrate therein is exposed to water and applied to an appropriate body portion about which it hardens.