A crew-neck t-shirt and black jeans are the kind of a never-failing casual look that you so desperately need when you have no extra time to spare. A pair of slip-on sneakers instantly bumps up the wow factor of this outfit. Rest assured, this combo will keep you cozy as well as looking stylish in this awkward fall weather. When it comes to style for men in their 40s, this combo is ideal.
For an outfit that's super simple but can be worn in a myriad of different ways, pair a crew-neck t-shirt with black sweatpants. Break up this look with a sleeker kind of footwear, such as these slip-on sneakers. This one is a viable choice when it comes to piecing together a standout look for transitional weather. This combo should clear any doubts you had about wearing casual clothes as a guy in his 40s.