For hundreds of years, the Swiss Guard has worn a distinctive, brightly-colored dress uniform and while protecting the Pope and Vatican City, with only a couple of minor changes over the years. This year, the Guard has made one big change: the traditional, metal helmet ? a morion ? is being replaced with ones that are 3D printed.
https://www.theverge.com/2019/2/24/18238786/vatican-swiss-guards-3d-printed-helmets