This product is a kind of customized macromolecule skin friendly material with external fixed splints for parts with a height of no more than 400mm, such as arms, wrists, ankles and calves. It is waterproof, lightweight and non skin irritant. The overall appearance adopts a round modeling style to make the product more friendly. Simplify the handle, simplify the redundant shape through the buckle position, and make the product more integral. Open a plane perspective window on the modeling of the overall arc surface, breaking the modeling limitations and easy to process. The bottom side-by-side door is easier for the staff to overhaul.