Most windbreakers fail at the one thing they are supposed to do well. They block the wind but trap every bit of heat your body generates, so ten minutes in you are either soaked through or peeling the thing off entirely. It is a very specific kind of useless. What we were looking for here were jackets that actually breathe, not in the marketing copy sense but in the practical, wearing it on a commute or a coastal walk sense where the difference is immediately obvious. Packability matters too. A windbreaker that folds into its own pocket earns its place in a bag in a way that a bulkier layer never quite does. We also paid attention to cut, because a slim technical jacket worn over a decent outfit looks considered, while a boxy one just looks like you grabbed it off a camping shop rail. These are the ones that handled the weather without betraying the outfit.