A specific chill hits around late September when your summer wardrobe suddenly feels wrong and your winter coats feel premature. The fix has always been the same: a good cardigan that pulls a look together without trying too hard. Nantucket style has quietly cornered the market on this in-between dressing, all soft neutrals, roomy shapes and cashmere that looks lived-in by design. Think of the polished, off-duty rich mom uniform: crisp white tee, straight-leg jeans, loafers and a cardigan doing most of the heavy lifting. These 17 picks range from chunky shawl collars to fine-knit button-fronts...