Pick a brand that names full-grain leather, not just leather. Read the warranty...

https://www.tool-bookmarks.win/choose-a-leather-brand-that-names-its-materials-not-just-premium-leather

Pick a brand that names full-grain leather, not just leather. Read the warranty to see what it covers, for how long, and how to make a claim. Check how initials are applied - stamped, embossed, or engraved - and where they go