Choose a brand that names its leather grade: full-grain leather should age well...
https://tiny-wiki.win/index.php/Do_Lab_Tests_on_Leather_Batches_Actually_Matter%3F
Choose a brand that names its leather grade: full-grain leather should age well with daily use. Read the warranty before buying, and check how initials are applied, so you know whether they’re stamped, embossed, or printed and how they’ll wear.