The overshirt lives in a genuinely useful gap that a lot of men struggle to fill. Too warm for just a shirt, not quite right for a jacket, and you want something you can wear open over a tee without looking like you grabbed whatever was closest. Regular fit is the right call here. Slim cuts fight against the layering logic of the whole thing, and boxy cuts make you look like you borrowed it. Regular fit sits over your clothes without adding bulk and moves like something you actually chose to put on.

We have been looking specifically at overshirts with enough structure to hold their shape through a full day and enough weight to do some actual work in cooler temperatures. Fabric matters more than most people realize. Flannel and brushed cotton are where we keep landing. The ones in here work open, work buttoned, work tucked into the waistband of heavier trousers. That kind of flexibility is the whole point.