Smart casual is where most men come unstuck, and the jacket is usually why. Too formal and the whole thing reads like you forgot to change after work. Too relaxed and it looks like an afterthought. The sweet spot is a jacket that carries the outfit without announcing itself, something with enough structure to look considered but enough ease to wear over a t-shirt without looking confused about what it is.

We have been looking specifically at jackets that solve this without asking too much of the rest of your wardrobe. Harrington styles that work harder than their price suggests. Shirt jackets in washed cotton or oxford cloth that sit right over a crew neck. Unlined blazers cut close enough to look sharp but not so close they only work with trousers. The construction, the collar, and how it falls when you leave it unbuttoned are what we are actually looking at. These are the ones that make the outfit without making it obvious they are doing so.