The zip is what separates a cardigan you actually reach for from one that sits folded and decorative. Buttons are charming in theory and a genuine negotiation in practice, especially when you just need to pull something on quickly. A zip solves that. It also gives a zip up cardigan a slightly more structured, intentional look that works harder across more situations than its buttoned counterpart. We have been pulling together our favorite options across weights and lengths because this category rewards a really good edit. The chunky knits that make working from home feel like a deliberate lifestyle choice. The lighter versions that sit neatly over a dress without adding bulk. The ones with a half zip that hit a particular sweet spot between casual and considered. All of them have the quality where the zip pulls smoothly and the fabric holds its shape through repeated wearing. These are the cardigans that earn their place in your regular rotation, not just your cozy intentions.