You'll be surprised at how very easy it is for any man to put together this casually classic ensemble. Just a grey wool blazer and black chinos. You could perhaps get a bit experimental when it comes to footwear and smarten up this look by finishing with black leather double monks. We're loving how ideal this getup is to stay warm and chic at the same time come winter. Gents wondering how to dress with style as you slip into your 30s, you have your answer.