The awkward season between a real coat and bare arms is where most wardrobes quietly fail. A heavyweight knit is too much. A t-shirt is not enough. What you actually need is a lightweight jumper that earns its place without adding bulk, without overheating you at lunch, and without looking like an afterthought. That is a harder brief than it sounds. A lot of options in this category are either too thin to do anything useful or cut in a way that bags out after two wears. We’ve been looking specifically at pieces that hold their shape, sit well over a collar or under a jacket, and work in cotton, fine merino, or a quality linen blend. Fabric behavior matters here more than almost anything else. A jumper that pills, stretches, or loses its color after washing is just a waste of money regardless of how it looked on the rack. These are the ones that last.