Wondering why some briefcases just keep going year after year? It comes down to...

https://wiki-aero.win/index.php/How_Many_Open-Close_Cycles_Should_a_Zipper_Survive%3F

Wondering why some briefcases just keep going year after year? It comes down to details like full-grain vegetable-tanned leather that ages beautifully and solid brass hardware built to last