This classic and casual combination of a blue crew-neck sweater and a dress shirt is very easy to put together without a second thought, helping you look amazing and prepared for anything without spending too much time combing through your closet. For something more on the casual side to round off this ensemble, introduce dark brown suede desert boots to the equation. When winter weather settles in, cosy up in warm clothes like this and you'll look and feel great. And if we're talking style tips for guys over 40, this outfit looks cool on almost any guy.