HP is expanding its mid-range ProBook 600 series with a new, lightweight 13.3-inch model powered by AMD Ryzen 4000. For the first time in a ProBook laptop, HP is using magnesium as the chassis material to reduce weight. However, if you want a weight of less than the magical 1 kg, you have to do without some extras.
https://www.notebookcheck.net/HP-ProBook-635-Aero-G7-Magnesium-ProBook-with-AMD-Ryzen-4000-weighs-only-999g.494366.0.html