The ZenBook S (UX391) is a particularly light 13.3-inch laptop from Asus. It tips the scale at just 1 kg, but the manufacturer says the performance is not affected. We review the rival for the XPS 13.
https://www.notebookcheck.net/Asus-ZenBook-S-UX391U-Core-i7-FHD-Laptop-Review.331490.0.html
Still wonder why all these high priced non-upgradeable notebooks come with less than 16 GB or RAM.