Solution: In the absence of ventilators and in order to reduce the costs, the solution is modification of commercial snorkelling masks that cover the entire face, with the help of a 3D printed extensions that is attached to the mask instead of a standard factory blower. Such masks could be used as: 1 – Substitute for ventilators, by directly connecting it to a source of oxygen in hospitals; 2 – A replacement part for existing ventilators, so-called balloon; 3 – Protection for medical staff. The 3D printing method is used as the anticipated amount of mask extensions does not justify mass production at this time. Also, by using 3D printing and rapid prototyping methods, fine tuning of the extension is possible along the way. The extension can be printed in environmentally friendly non-toxic PLA biodegradable plastic and disinfected with ethanol, while the mask itself can be sterilized by autoclave process or disinfected with ethanol or a mix of water and bleach. The proposed system is significantly cheaper than existing medical devices, it is easier to procure the necessary parts and it can be available in a very short time for a large number of patients and medical professionals. The project envisages modifying 1.000 snorkelling masks to be used in hospital settings.