The open collar shirt is one of those things that looks effortless on some men and slightly unresolved on others, and the difference is almost always the shirt itself. A bad one collapses the moment you undo the top button. The collar splays, the fabric loses its composure, and the whole thing starts to look like you just woke up. A good one holds. The collar sits with intention, the fabric drapes with enough weight to look considered, and unbuttoned becomes a choice rather than an oversight.

We’ve been looking specifically at shirts that work in that register, the ones you wear to a dinner where a jacket comes off early, the Saturday that turns into an evening, the trip where you need one shirt to do three things. Fabric quality and collar construction are what we kept coming back to. These are the shirts that reward the second button being left undone. That is not an accident of design.