The SAM Splint is based on the ancient principle: Curves are strong.
By bending the material it becomes enormously stiff and any fracture or injured limb can be splinted. Even the neck can be immobilized.
Because the material is made of a thin layer of aluminium surrounded by foam rubber, it is very flexible. This allows a very flexible and flexible piece of aluminium to be folded into a product that has even been used by people as a paddle or snow shovel in emergency situations.
Moreover, it is easily deformed and soft enough to cut in any size and is X-ray permeable.