A composite moldable splint having at least a first splinting member with an inner foam layer, an intermediate thermoplastic layer, and an external securing layer. The inner foam layer provides a soft, moisture transmitting, non-latex padding. The intermediate thermoplastic layer provides remoldable shape, and rigidity and strength after heat forming and cooling. The outer securing layer, preferably covered with continuous loop fabric suitable for hook and loop fastening, provides an essentially infinite plurality of attachment points for retaining straps including at least a section of hook fastening material for holding the splint in place. The layers of the composite moldable splint are preferably heat welded to form a strong unitary structure that is resistant to delamination. Composite moldable splints utilizing multiple splinting members are described.