Why not dress in a navy and white vertical striped long sleeve shirt and beige shorts? As well as super comfortable, both of these items look awesome when paired together. Kick up the wow factor of your outfit by sporting a pair of beige athletic shoes. Seeing as it's roasting hot outside, this combination is ideal and entirely summer-friendly. Those who are curious how to wear modern casual outfits as you work your way through your 20s, you have your answer.