Ever wonder what makes a briefcase stick with you through years of daily use?...

https://astro-wiki.win/index.php/Why_Does_a_Lockstitch_Seam_Unravel_When_One_Thread_Breaks%3F

Ever wonder what makes a briefcase stick with you through years of daily use? It’s all in the details—like full-grain vegetable-tanned leather that ages beautifully and solid brass hardware that won’t bend or break