The Fixo Splints work to immobilize limbs with PVC and nylon materials and closures with Velcro materials in matching colors. These splints can resist liquids of all sorts and can be washed in soap and water. This kit features an extra small size for child arm fractures and adult forearm fractures up to 310 mm long. A small one for a child's leg fractures or adult fractures on the arm and forearm is also available at 510 mm in length. There's also a large size for adult leg, ankle and knee fractures that is around 735 mm or 28.93 inches long.