DUMON® stents are made of specially treated medical grade transparent or radiopaque silicone without reinforcement (implantable for more than 29 days). They are considered the golden standard to which all others should be compared.1) Depending on design, there are 2, 3 or 4 lines of studs on the stent outside. This stud system has proven its reliability for improved stent xation between the cartilaginous rings of the trachea and the bronchial tree. The stent inside is treated with a silicone-based layer which makes the surface anti-adherent, minimizing the risk of obstructions and improving mucociliary clearance. For the various indications and their sites, a large variety of stent types is available as well as a large choice of lengths and diameters.