Try teaming a long sleeve t-shirt with navy jeans for a fuss-free ensemble that's also put together nicely. A good pair of white high top sneakers is the most effective way to infuse a hint of stylish casualness into this ensemble. It's a smart option if you're picking out a well-coordinated look for summer-to-fall weather. And if we're talking casual clothing for gents in their 50s, this getup is perfect.