This laid-back combination of a light blue harrington jacket and a crew-neck t-shirt is very easy to put together without a second thought, helping you look awesome and ready for anything without spending a ton of time rummaging through your wardrobe. You could perhaps get a bit experimental when it comes to shoes and class up your outfit by sporting a pair of dark brown leather casual boots. All in all, an ideal demonstration of casual fashion for 30-year-old gents.