This off-duty combination of a navy and white plaid blazer and white jeans is a foolproof option when you need to look cool and relaxed in a flash. When it comes to shoes, go for something on the casual end of the spectrum and finish off this look with low top sneakers. Clearly, it's easier to work through a super hot afternoon in a summery getup like this. This combination proves that cracking the fashion code as a man in his forties is easier than one might think.