Demonstrate your credentials in men's fashion in this laid-back pairing of a navy long sleeve shirt and light blue jeans. For something more on the elegant end to round off this look, introduce brown leather casual boots to the mix. As you can see here, it's very easy to look amazing and stay snug when chillier days are here, all thanks to combinations like this one. So if you need style tips on what to wear in your 20s, this getup is a great example.