The case for a slim fit jacket comes down to one simple thing: proportion. A jacket that skims the body rather than drowning it reads as deliberate. It looks like you made a choice. The problem is that slim cut is one of the most abused phrases in menswear, applied to everything from genuinely tailored pieces to jackets that are merely less terrible than their oversized counterparts. We’ve been through a lot of them. What we’re looking for is a suppressed waist that doesn’t pull, a chest that lies flat, and a sleeve that finishes where it should without requiring alterations straight out of the box. These are not fashion pieces that will date badly in three years. They are jackets built around a cleaner silhouette that happens to work harder across more occasions than a roomier cut ever manages. Worn with trousers or jeans, dressed up or kept casual. The fit does most of the work.