Portuguese Flannel knows how to do summer shirts without making you look like you are heading to a bad fancy dress party. This navy option is cut from a light cotton blend with just a touch of polyamide, giving it a bit of breezy structure that will not immediately turn into a crumpled mess the second you sit down. The camp collar keeps things laid-back, while the white dot pattern adds some visual texture without shouting. It is finished with proper mother of pearl buttons and a clean chest pocket. Throw it on unbuttoned over a white tank for a pub garden afternoon, or button it up with some relaxed linen trousers when you need to look like you made an effort for dinner.