TOPSHOT - Italian engineer Mario Milanesio poses with a Decathlon snorkeling mask, with 3D-printed respiratory valves fittings he designed, on March 26, 2020 at his home in Savigliano, Piedmont, during the country's lockdown aimed at curbing the spread of COVID-19, caused by the novel coronavirus. - Engineer and professor at a technical institute in Fossano, Mario Milanesio developed a different version of fittings for valves of Decathlon's snorkeling mask, created by Brescia-based Italian startup Isinnova. Milanesio's version is being created after a web marathon with a large online group of 3D-printing passionates in the Piedmont region over the past days. (Photo by MARCO BERTORELLO / AFP)