This relaxed pairing of a light blue vertical striped long sleeve shirt and a white crew-neck t-shirt is super easy to pull together in next to no time, helping you look dapper and prepared for anything without spending a ton of time combing through your wardrobe. Enter a pair of black leather low top sneakers into the equation et voila, the outfit is complete. You can bet this combo will become your go-to come warm sunny days. Those who wonder how to wear cool off-duty outfits as you progress through your 20s, this pairing should answer your question.