A long sleeve shirt and navy jeans are the kind of a no-brainer casual ensemble that you need when you have zero time. Kick up the cool of your outfit by rocking dark brown chelsea boots. As this combination shows, you can't think of a better idea for hot weather. If you frequently fret about dressing age-appropriately, this combination is a safe bet.
For an outfit that's very easy but can be manipulated in plenty of different ways, pair a long sleeve shirt with black jeans. If you wish to easily dress up your look with shoes, introduce a pair of dark brown chelsea boots to this look. If you're thinking of a summer-ready look, this one is a nice idea. This getup illustrates that in your forties your style options are looking good.