A navy field jacket and a white long sleeve shirt are wonderful menswear staples that will integrate perfectly within your current off-duty fashion mix. Tan suede desert boots will be a welcome complement for this getup. Now that's an outfit any guy in his forties will like.
To create a relaxed ensemble with a fashionable spin, you can rock a navy field jacket and a white long sleeve shirt. To bring out a more easy-going side of you, complement your outfit with brown leather work boots. This outfit should clear any doubts you had about wearing casual clothes over 40.