This is how you do summer smart without looking like you tried too hard. Cut from a lightweight cotton-blend seersucker, this jacket has that signature puckered texture that keeps the fabric off your skin, making it brilliant for hot days when you still need to look sharp. The soft, unstructured shoulder and three-button front give it an easy, relaxed drape that feels more like a favorite overshirt than a stiff, heavy blazer. It is finished with three classic patch pockets and functioning cuff buttons, keeping things functional and completely unfussy. Throw it over a simple crewneck tee for a pub garden lunch, or team it with the matching Mareham trousers when you have a summer wedding or a day at the races on the cards.