For an effortlessly neat ensemble, consider pairing a navy blazer with navy chinos — these pieces play pretty good together. And if you wish to instantly up the ante of your ensemble with a pair of shoes, add navy leather tassel loafers to the mix. Rest assured this ensemble is something you can totally wear as a 20-year-old guy.
If you'd like take your casual game up a notch, wear a navy blazer with teal sweatpants. To introduce some extra flair to your outfit, add a pair of navy leather tassel loafers to the mix. As you're progressing through your late 20s, you probably want to start dressing maturely. In this case, combinations like this are a foolproof option.