The objective of this project has been the design and industrialization of sanitary masks with a degree of protection FFP3. The production should make up for the lack of supply during the pandemic.

In addition to FFP3 protective masks, FFP2 and F9 protective filters have also been prepared, which are more suitable for filters in less critical environments. These models offer a high level of safety while increasing the comfort of breathing.

This project to develop measures to mitigate the effects of CoVID-19 is being developed under the supervision of the Girona Medical Association.


  • Design and production of semi-rigid and reusable masks, with removable and interchangeable filter cartridges of categories FFP3 and FFP2, design oriented to industrial and health environments.

  • The design of masks has been oriented to the industrial manufacture, using the productive capacities already existing in the territory.

  • Design supervised by the Official College of Physicians of Girona and endorsed by the systematic measures carried out by Eurecat laboratory.

  • The masks have been designed without an exhalation valve to minimize possible infection between users. Despite the absence of the exhalation valve, good breathability levels have been maintained to reduce user fatigue.

  • Current production capacity of 1500 masks daily.

  • Marketing of FFP2 version by Prometal3D

Presentation available at the link YouTube - Mascareta Aleu 29052020


The name ALEU has been chosen in reference to Dolors Aleu i Riera, she was a Catalan doctor, the first woman with a degree in medicine in Spain and the second to obtain a doctorate.