For continuous and professional use. The inside of the cushion is realised in closed cells polyurethane that confers to the structure adequate conformation and an excellent comfort. The external part is covered by anti-tearing Oxford nylon and the internal part by soft and transpiring t-mesh. The support is protected by a rigid cupola, printed by injection in polypropylene, fastened to the cushion by brass loops. The closings are constituted by two bands of elastic with self-adherent strips application, that guarantees a firm posterior closing and correct regulation.