This classic and casual combination of a navy shirt jacket and white linen chinos is extremely easy to throw together without a second thought, helping you look sharp and ready for anything without spending a ton of time combing through your wardrobe. Why not take a more laid-back approach with shoes and add a pair of espadrilles to the equation? You're sure to always look stylish even despite the sweltering heat if you have this outfit as a last-minute grab. As you're going from your 20s to your 30s, you probably want to start dressing maturely. In this case, combinations like this are a fail-safe option.