If the setting permits a relaxed outfit, you can wear a v-neck t-shirt and charcoal chinos. Complement this outfit with a pair of black derby shoes to completely shake up the outfit. Your late twenties is the time to start dressing more professionally. And it's easy with visual examples like this.
Black Derby Shoes with V-neck T-shirt Warm Weather Outfits In Their 20s
Make a powerful statement anywhere you go in a v-neck t-shirt and a charcoal check suit. For something more on the classier end to finish your ensemble, introduce black derby shoes to the equation. This combo illustrates that as a younger man, you have a vast array of sartorial options.