The overshirt is one of those pieces that sounds simple until you try to get it right. Wear it open over a tee and it needs enough structure to not look like a chore shirt. Wear it buttoned up with trousers and it needs to read as intentional rather than accidental. Check patterns add another layer of difficulty because a bad check reads as costume while a good one reads as considered. We’ve been looking specifically at scale, color combination, and weight. A check that’s too bold dominates everything around it. Too subtle and you wonder why you bothered. The ones we’ve picked here sit in a place where the pattern does something without doing too much. Brushed cotton, heavier flannels, and the occasional textured weave are where we’ve spent most of our attention. These work as a third layer in cooler weather and hold their own in the transitional months when the wardrobe needs options. Worth adding at least one.